You didn’t give any options but i’m assuming it’s “oxygen”
At EVERY point on Earth . . . North of the equator, South of the equator, at the poles, or exactly ON the equator . . . the lengths of days and nights change with the seasons. (probably supposed to be <em>choice-3</em>)
Answer:
a) are the sources of long-period comets.
Earth is the only planet that habours life.
So the answer to the question would probably be no.
Typically associated with a Cold front
