Correct Answer: Equator

Solution : The correct answer is the Equator .

When the sun is directly above the equator, neither of the poles is facing towards the sun. As a result, the entire earth has equal days and nights. This is known as an equinox.
The vernal equinox, known as the spring equinox, occurs in the Northern Hemisphere around March 20th or 21st, whereas it occurs in the Southern Hemisphere around September 22 or 23.