Answer:
the biosphere and the geosphere
Explanation:
Answer:
its B bcz its driven by density gradient due to variation in temperature
The sun appears to cross the plane of Earth's equator
when it reaches either one of the "equinox" points in the sky.
At those times, the lengths of day and night are nominally equal
everywhere (except at the poles), and the occasions are marked
as the beginning of Spring and Autumn.
