Answer:
Option (A).
Step-by-step explanation:
The substance can exist in three different forms known as solid, liquid and gas. These forms of the substances are differentiated on the bases of the inter molecular distance, force of attraction and fluidity.
Gases nether have fixed volume nor the fixed shape and can change itself according to the place in which it is kept. The kinetic molecular theory of the gases states that the gases are always in the rapid and random motion. This is possible due to the presence of the least force of attraction among the particles of the gases.
Thus, the correct answer is option (A).