Answer:
He believes that before jumping to the conclusion that certain video games increase violent behavior in young people, it is necessary to study the effects for a longer period of time.
The tense is all mixed up, but it looks like present is used most often, so "emitted" should be changed to "emits" and "pulled" should be changed to "pulls." I can't see the entire paragraph so just make sure that's consistent.
You don't need a comma in "running towards us with the fire extinguisher."
"Your mother and me" should be "Your mother and I." For reference try taking our "your mother" - it sounds pretty silly to say "me thinks" unless you're in the 1600s, right? And it should be "think" instead of "thinks."
<span>The answer is true - Both Wilfred Owen and Siegfried Sassoon wrote about their firsthand knowledge of the horrors a soldier encountered on the battlefield.</span>
Subjects are "Janet" and "Peter". A subject is a person place, thing or or even idea in a sentence.
Verbs are "drove" and "camped". A verb is a word used to describe action.