What force is responsible for the earth revolving round the sun?

When an object is dropped from a height, it accelerates and falls down. Name the force which accelerates the object.

Give the formula for the gravitational force F between two bodies of masses M and m kept at a distance d from each other.

What name has been given to the force with which two objects lying apart attract each other?

What type of force is involved in the formation of tides in the sea?