According to the online content article about days and nights on Earth, why does the length of a day change throughout the year?

Earth’s axis is tilted relative to its orbit around the Sun. As Earth travels around the Sun during the year, each hemisphere receives different amounts of daylight in different seasons, so the length of the day changes. The Sun does not revolve around Earth, and Earth rotates once in about 24 hours—not once a year.

AI-written and checked against the verified answer.