With the Heliocentric Theory, how did Copernicus explain the day and night cycle on the Earth?

Question

a
The Sun is also rotating around the Earth at the same time
b
Sunlight is being reflected off of the Moon as it orbits around the Earth
c
The Sun rays interact with the atmosphere at different times of day, creating bright and dark times of the day
d
The Earth is actually rotating around on an axis, changing which side of the planet faces the Sun at any given time

Answer 1

The correct answer is:

d. The Earth is actually rotating around on an axis, changing which side of the planet faces the Sun at any given time.

Copernicus's Heliocentric Theory posited that the Earth rotates on its axis, which is responsible for the cycle of day and night as different parts of the Earth face the Sun at different times.