Why do gases show high compressibility?

Give reasons for the following:
$(a)$ Water droplets appear on the outer surface of a tumbler containing ice-cold water.
$(b)$ People prefer to wear cotton clothes in summer.
$(c)$ On a hot sunny day,people sprinkle water on the roof or open ground.

$A$ rubber band can change its shape on stretching. Will you classify it as a solid or not? Justify your answer.

Which is the correct statement?

State whether the following statement is true or false:
The diffusion in liquids depends upon the thickness (viscosity) as well as on the chemical nature of the diffusing liquids.

List two processes from which it may be concluded that the particles of a gas move continuously.