Hannah created a blog to help readers find and purchase her new album. The main purpose of her blog is to
persuade.
entertain.
educate.
advertise.

She wants to advertise, because her main purpose for the blog is for people to purchase her new album.

Explanation:

Advertise, it is simple when using keywords.

Explanation:

the question states:

Hannah created a blog to help readers find and purchase her new album. The main purpose of her blog is to

so if you take it and do this;

Hannah created a blog to help readers find and purchase her new album.

PURCHASE is the big word there.

faulty parallelism is a construction in which two or more parts of a sentence are equivalent in meaning but not grammatically similar in form.

the correct version of this faulty parallelism in the sentence is:

the hikers knew that the hike was six miles, that it usually required the entire day, and it would not be wise to start after 10: 00 a.m.

the problem is the last sentence, the first two have a basic subject+verb+object structure.

so, to give a proper balance to the structure, or better said, to give a parallel structure, we must write a basic s+v+o structure in all three sentences:

the hikers knew that the hike was six miles, that it usually required the entire day, and it would not be wise to start after 10: 00 a.m.

what’s your question?