I think the most strongest traits in a persuasive essay: is organization, a voice, and word choice.
Answer:
It’s tough to watch our children struggle through the hardships that can teach life lessons—even when we know they’ll come out stronger for it on the other side.
It is in a subjunctive mood since the underlined word is were. You are likely dealing with a unreal conditional sentence.
Also this may be too complicated for you as my skills of writing may be better than yours and your school may suspect this so I'm only gonna do this much and then you finish it ok.
