Question

..... and ....... exert pressure on the walls of their containers​

Answer 1

Answer:

liquids and gases is the answer of the fill in the blank

Explanation:

Answer 2

Because in the gaseous state, the particles move about randomly at high speed. Due to this random movement, the particles hit each other and also the walls of the container. The pressure exerted by the gas is because of this force exerted by gas particles per unit area on the walls of the container.