Item CL145001: The angle between the earth’s axis and the plane of the earth’s orbit around the sun does not change at all during a year.

Which of the following statements is TRUE about the angle between the earth’s axis and the plane of the earth’s orbit around 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.