\centering
\begin{subfigure}[t]{0.24\textwidth}
\centering
    \scalebox{0.6}{
    \begin{tikzpicture}
    % Define the box
    \node[draw=brown, thick, rounded corners, text width=\boxwidth, minimum height = 9.5cm, inner sep=10pt] (box) {
        % Heading
        \centering
        \textbf{Concept 2} \\
        % Draw a horizontal line
        \tikz \draw[brown, thick] (0,0) -- (\linewidth,0);\vspace{1em}
        % Lines of text\
       \fixheightboxapp{
 some cows were \highlight{wounded.}\\
 or \highlight{diarrhoea}.\\
 supply themselves with food.\\
 so \highlight{itchy everywhere}.\\
 \highlight{bullet} in the head;\\
 those various \highlight{gunshots}.</s>\\
 once I was \highlight{wounded}.\\
, one \highlight{hit me} in\\
 three bursts of \highlight{gunfire}.\\
 themselves from the \highlight{bullet}s.\\
 to work I kept crying\\
 and \highlight{killed} animals for wedding\\
 the \highlight{gunshots} and we were\\
 I even saw \highlight{dead bodies}\\
I cry every night.
        }
    };
\end{tikzpicture}}
\caption{firearms, physical injuries}
\end{subfigure}
\begin{subfigure}[t]{0.24\textwidth}
\centering
    \scalebox{0.6}{
    \begin{tikzpicture}
    % Define the box
    \node[draw=brown, thick, rounded corners, text width=\boxwidth, minimum height = 9.5cm, inner sep=10pt] (box2) 
    {\centering
        % Heading
        \textbf{Concept 4} \\
        % Draw a horizontal line
        \tikz \draw[brown, thick] (0,0) -- (\linewidth,0);\vspace{1em}
        \fixheightboxapp{
and when he \highlight{attacked} me\\
 chief, was \highlight{very cruel}\\
 I was \highlight{punished} that way\\
  He \highlight{pressed} me against\\
 His disappearance was very \highlight{painful}\\
 Bou Meng was \highlight{tortured} for\\
 who \highlight{tortured} me was Si\\
 and then my eyes would\\
olded me for being blinded\\
 so I had him buried\\
, they stopped \highlight{beating} me\\
 who tore the child away\\
 all the \highlight{beatings} that\\
 They started \highlight{beating} me,\\
 task of killing people.
        }
    };
\end{tikzpicture}}
\caption{torture, abuse}
\end{subfigure}
\begin{subfigure}[t]{0.24\textwidth}
\centering
    \scalebox{0.6}{
    \begin{tikzpicture}
    % Define the box
    \node[draw=brown, thick, rounded corners, text width=\boxwidth, minimum height = 9.5cm, inner sep=10pt] (box2) 
    {\centering
        % Heading
        \textbf{Concept 6} \\
        % Draw a horizontal line
        \tikz \draw[brown, thick] (0,0) -- (\linewidth,0);\vspace{1em}
        \fixheightboxapp{
 long you \highlight{fell unconscious}.\\
 falling into the ground.\\
 another place two \highlight{bodies},\\
 them \highlight{were lying} on the\\
 weapon in my mouth.\\
 I started freezing, and\\
 up the \highlight{dead bodies} and\\
 us drowned in the river\\
 a \highlight{lot of dead} and\\
 people who \highlight{perished} there.\\
 children \highlight{die} of hunger,\\
 then we all got stuck\\
 people and throwing their \highlight{bodies}\\
 her sister burned to \highlight{death}\\
 who \highlight{died} of hunger,
        }
    };
\end{tikzpicture}}
\caption{death, motionless bodies}
\end{subfigure}
\begin{subfigure}[t]{0.24\textwidth}
\centering
    \scalebox{0.6}{
    \begin{tikzpicture}
    % Define the box
    \node[draw=brown, thick, rounded corners, text width=\boxwidth, minimum height = 9.5cm, inner sep=10pt] (box2) 
    {\centering
        % Heading
        \textbf{Concept 7} \\
        % Draw a horizontal line
        \tikz \draw[brown, thick] (0,0) -- (\linewidth,0);\vspace{1em}
        \fixheightboxapp{
December he \highlight{called} me and\\
 my husband \highlight{called} cadres\\
 sometimes he  \highlight{called} me to\\
 his phone  \highlight{call} because he\\
 or  \highlight{called} me and then\\
 was  \highlight{called} Lucia, Ruk\\
 know what happened to Ph\\
 man  \highlight{called} Rukara went\\
 since I was busy looking\\
 school was  \highlight{called} Hasan Ve\\
 really is still in my\\
 one \highlight{called} me up and\\
 my wife  \highlight{asked} them what\\
  \highlight{tell} you exactly when this\\
 It arrived in Kosovo Pol
        }
    };
\end{tikzpicture}}
\caption{communication, asking questions (non-traumatic)}
\end{subfigure}