give an exmple of gravitation

Sure, here is an example of gravitation:

Consider the Earth and the Moon. The Earth, being much larger, has more gravity. It pulls on the Moon and keeps it in its orbit. This is why the Moon circles the Earth instead of just floating off into space. This is an example of gravitation - every object in the universe, no matter how small, exerts a gravitational pull on every other object. The more massive the object, the stronger its gravitational pull.