Question

cloud float in sky.
give geographical region

Answer 1

Clouds are made of tiny drops of water or ice. Gravitational forces try to make those drops fall to the ground. But because the drops do not weigh very much, they are pushed back upwards due to buoyancy. Buoyancy is the force due to all the air molecules below the cloud resisting any downward motion. The picture below shows the gravitational and buoyancy forces acting on a balloon. But instead of a large balloon, think of many many cloud drops.

Another analogy is a buoy floating in the ocean. Gravitational forces are trying to pull the buoy down to the bottom of the ocean, but the mass of all the water underneath prevents this. Likewise, the drops that make up a cloud float at an altitude where the gravitational forces and buoyant forces balance, causing no upwards or downwards motion.