What does the author use to support the idea that Earth is the only planet that is habitable? a. information about which other planets might support life
b. expert testimony from scientists about life on Earth
c. a list of which gases are safe for humans to be around
d. facts about the reactive gases on a planet like Jupiter

Explanation it says in the passage that you gave us to answer the earth is a unique planet it also say on earth much of the water stays liquid also i say jupiter is  88-92% hydrogen so that would mean the answer might be D i not sure tho but that what i think just tell me if i am wrong in the comments if so i'm Sorry then

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.