Read this line from "Empire State Building." It's lonely up here without my big twin brothers,

the World Trade Center Towers.

Which fact is most important for readers to know in order to understand the significance of this line?

The World Trade Center Towers were important office buildings.
The World Trade Center Towers were extremely tall.
The World Trade Center Towers fell on September 11, 2001.
The World Trade Center Towers were built in the early 1970s.

this is not english work

explanation:

it is math

quite an interesting way to teach topic sentences, because the answer to this question is the best definition of a topic sentence that one can present, it is as if answering the questions taught you how to do it, this is some real teaching, it is terribly well-done.

the topic sentence in this paragraph is:

topic sentences writers stay on track and keep a paragraph from becoming an aimless collection of sentences about an idea.

which incidentally tells you what a topic sentence should be.

answer: gfdhfghfghfghfg

explanation:

hfghfghgfhfg

martians or other types of aliens represent a unique fear as opposed to zombies. vampires and other types of monsters.   in most sci-fi stories, aliens come from other worlds and have different or more advanced technology.   abductions and experimentation on human bodies that involve these technologies, or the use of these technologies against human beings and the use of unknown "powers", are a type of fear that's different from that of other types of monsters.