How much is the gravity of the moon when compared with that of the earth?

1/6th

The correct answer is Option (2) - 1/6th

The Moon's surface gravity is about 1/6th as powerful or about 1.6 meters per second per second. The Moon's surface gravity is weaker because it is far less massive than Earth. A body's surface gravity is proportional to its mass, but inversely proportional to the square of its radius.