At the minimum, a prepositional phrase will begin with a preposition and end with a noun, pronoun, gerund, or clause, the "object" of the preposition. In = preposition; the, weedy, overgrown = modifiers; garden = noun.
The correct answers are:
5.) I
6.) Them
7.) Them
8.) Its
9.) All
10.) Who
These have been edited, they are now correct.
I believe it’s The history of American literature stretches across more than 400 years. It can be divided into five major periods, each of which has unique characteristics, notable authors, and representative works.
Or
The history of American literature stretches across more than 400 years. It can be divided into five major periods, each of which has unique characteristics, notable authors, and representative works.
I’m so sorry if I get it wrong
