Explanation:

- The Moon takes the same amount of time to complete one rotation on its axis as it does to orbit the Earth once.

- This period is about 27.3 days, which is why we always see the same side of the Moon from Earth.

- Option 1: (1, 3) – Says the Moon rotates once while revolving three times. This is incorrect.

- Option 2: (2, 2) – Suggests two rotations per two revolutions. This matches, but the ratio simplifies to one rotation per revolution.

- Option 3: (1, 1) – Correct! One rotation for one revolution, which matches how the Moon moves.

- Option 4: (4, 4) – Four rotations per four revolutions. Again, this is four times the actual number, so not accurate.