Er. so what kind of advice were you looking for?
If grammar, a few things, like keep plural w. plural verbs in sentence one. and also with sentence one, try to elaborate on those importance benefits of forests. maybe spread them into a few more sentences instead of a list, possibly saying what you believe is the most important, the more noteworthy, etc. That will make the sentence clearer and introduce why you want to follow forestry.
As a Research Assistant, I worked on three different research projects encompassing theoretical, analytical and field work that deals
that dealt* with
Maybe mention a little bit more what those fields that those research opportunities were about, how they are needed/important to you, etc
By the way, how brief a discussion do they want:?