Why is spring in the northern hemisphere?

➢ The vernal, or spring, equinox falls on March 20 or 21, and the autumnal equinox is on September 22 or 23. The seasons in the Northern Hemisphere are the opposite of those in the Southern Hemisphere. ... In December, when the Northern Hemisphere is tilted away from the sun, with fewer hours of daylight.

the cell cycle is the final answer! : )

i think the answer would be d