Item CL144001: The angle between the earth’s axis and a line between the center of the earth and the center of the sun changes gradually every day of the year.

Which of the following statements is TRUE about the angle between the earth’s axis and a line between the center of the earth and the center of the sun?

  1. It changes gradually every day of the year.
  2. It changes two times a year.
  3. It changes four times a year.
  4. It does not change at all during a year.