Which aspect of act 2 of the monsters are due on maple street marks it as science fiction and not fantasy fiction? it is about aliens and takes place on another planet. it is about humans who meet aliens here on earth. it is about aliens visiting earth and observing humans. it is about magical events that cannot be explained.

It is about aliens visiting Earth and observing humans.

Explanation:

Science fiction differences from fantasy fiction because science fiction describes things that if we push the limits of imagination can be created with science and technology, like spaceships, or portals to other parts of the galaxy, or aliens, and fantasy fiction deals with things that are purely creation of the imagination, magic, fantastic powers and super-humans, so the thing that separates The Monsters Are Due on Maple Street would be the fact that the aliens are visiting Earth and observing humans.

im not entirely sure what you're asking.