Take out the bare parts: the subject and verb: forests _____.
If you still can't tell, assimilate it to something easier. Let's say "they are".
Both "forests" and "they" are plural.
Now, you wouldn't say "they is"; the verb also has to be plural.
Back to "forests _____": forests contain. (A)
By the Process of Elimination, C and D are incorrect. You also cannot fill it out with "has contained" because that is singular. It would be "have contained", but that does not make sense in the context.
So, the final answer would sound like this:
The forests near my home contain many different types of trees and plants.
I hope that clarifies the problem (:
The Preamble:
We the people of the United States of America, in order to form a more perfect union, establish justice, ensure domestic tranquility, provide for the common defense, promote the genreal welfare and secure the blessings of liberty to ourselves and our posterity, do ordain and establish this constitution for the United States of America.
It states that they're going to provide freedom for the nation, provide support for our soldiers (I think that's what they mean by common defense), enforce laws, and basically make the nation just a peaceful, free land.
Let me know if this helps.
Use MLA format and explain details in which you find interesting also follow the guide line as close as possible and your sure to get a good grade.
Hope this helped.