[arunp]

Originally Posted by Naamplao

An essay is a short piece of writing on a subject.
A composition can mean an essay written in school. To describe a piece of writing say in a book or magazine as a composition would probably insult the writer.

First of all, suffuse is a $5 word to me. That is, very few people know the actual meaning of this word. So it is too complicated for normal writing. I had to look up its meaning myself and it means a spreading of color or moisture not spreading of plants. So unless you are being poetic when using this sentence, it is not the correct usage of the word.

A better sentence would be

Swampy areas are filled with flora.

I am not certain you wanted the last sentence evaluated (seems like a mission statement for your school) but it is a very good sentence.

Absolutely . Some more information on usage of the word suffuse is provided by the URL Definition of suffuse - Merriam-Webster Online Dictionary.