Which kind of psychologist would be consulted in jury selection and witness preparation?

Forensic psychologist would be consulted in jury selection and witness preparation. 
These psychologists are there to apply their knowledge of psychology when it comes to legal cases. So here, this psychologist would have to prepare the jury for being in a court, tell them what to expect, recommend how they should behave and what they should look like, etc.

You can drink laxative, or  do this exercise when you are sitting in the bathroom on the toilet. to relieve  constipation  fast or in about 1 minute, pinch your nose after your usual exhalation. start holding your breath. but do not mouth breath during this just hold your breath. 

This question is an opinionated one, and we don’t know anything about the module or anything, thus we can not answer it. but if you are having trouble on what it is asking basically it is just asking to (using your knowledge on the topic) say which topics you were most interested and which were the most challenging.hope this : p