What indicates that the author's purpose is to inform readers about travel south of Madagascar and Zanzibar? The author shares facts and specific details about the difficulty of sailing in the region.
The author tells a dramatic story about ships having difficulty sailing in the region.
The author expresses nervousness about the animals living in the region.
The author wants to discourage readers from trying to sail in the regio

This question is missing the excerpt. I will not add it here because it is quite long, but the complete question can be easily found online. The excerpt belong to "The Travels of Marco Polo".

The option that indicates that the author's purpose is to inform readers about travel south of Madagascar and Zanzibar is:

A. The author shares facts and specific details about the difficulty of sailing in the region.

Explanation:

Marco Polo was a Venetian adventurer who lived from 1254 to 1324. "The Travels of Marco Polo" is a book based on his trips and discoveries and written by Rusticiano de Pisa, who met Polo and had the chance to hear the adventurer himself tell the stories.

In the excerpt that can be found online, the author is informing readers about travel south of Madagascar and Zanzibar. The passage is written as it it were Polo himself describing the difficult travel conditions in the region. He provides readers with facts about the currents that prevent ships from going a certain direction. According to him, the currents are always southward. A ship may take 20 days to go a certain way, but three months to return precisely because of the currents.

faulty parallelism is a grammar construction where there is no balance in the parts of a sentence they have a similar meaning but the grammar structure is not equivalent.

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

jefferson wrote the declaration of independence, and he was the nation's third president.

the problem with the first version is that the sentence:

"jefferson was both the writer of the declaration of independence"

presents jefferson as both a subject and an agent for the verb "write" because if he was "the writer" then the declaration of independence was written by him, besides that fact, the sentence presents a dependent clause.

while the second sentence:

he was the nation's third president.

presents 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 both sentences:

jefferson wrote the declaration of independence, and he was the nation third president.

halibut, flounder, tuna, and trout are all fish. so your first answer is 1.) fish. and since fish is edible, your next answer would be 3). edible

to describe those fishes more thoroughly, some of those fishes live in fresh water, and some of the fishes live in salt water, and that is not a thing that they all have in common. the question is asking what is common with all of the fish, so answer choices 2). fresh water and 4). salt water are not right.