The author’s main purpose in the text is to — A. inform the audience of various ways to recycle clothing and textiles
B. persuade the audience to recycle clothing and textiles instead of throwing clothes away
C. persuade clothing stores to create mandates that insist all stores offer recycling
D. entertain clothing stores with stories about what happens to clothing when it is recycled
Can someone help?

often a noun phrase is just a noun or a pronoun:

people like to have money.

i am tired.

it is getting late.

the answer is b. i read this story before.

sentences vary by structure as well as by function. there are compound, complex, and compound-complex sentences.

simple sentence

i like to read.

a simple sentence has one independent clause.

compound sentence

i like to read, and i also like to write.

a compound sentence includes more than one independent clause, connected by a coordinating conjunction (and, but, for, nor, or, so, or yet).

complex sentence

i prefer to read books that are bestsellers.

a complex sentence includes one independent clause and one or more dependent clauses. (a dependent clause is one that cannot stand alone.) types of dependent clauses include relative clauses (i kicked the boy who pinched me), adverb clauses (i am going home now because i have a curfew), and noun clauses (i don't know what to do next).

compound-complex sentence

although i prefer to read current bestsellers, i do like to read old agatha christie mysteries, and i also like some 20th-century science fiction.

compound-complex sentences take a bunch of clauses (multiple independent clauses, and one or more dependent clauses) and toss them together like a salad. although these sentences take practice to write in a grammatically correct fashion, they can hold a tremendous amount of meaning, and are common in academic writing.