Select all of the sentences that demonstrate correct parallel sentence structure.

1, 2, 4.

Explanation:

To answer this question, you must first understand what parallelism is. In English, we always have to keep our writing consistent and concise, and this is what parallelism is very good for. When you're writing a sentence that lists certain things, you have to keep them consistent—and this can mean listing all nouns, all verbs in the same part of speech, all adjectives, or all adverbs.

WRONG example: I like to eat, sleeping, and breathe.

RIGHT example: I like to eat, sleep, and breathe. or: I like eating, sleeping, and breathing.

WRONG example: She is tall, pretty, and confidence.

RIGHT example: She is tall, pretty, and confident.

Hope this helps! :)

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.