What conclusion follows from the random movement of pollen grains suspended in air?

1. The pollen grains jitter because unseen air particles keep striking them. 2. That only makes sense if the air is made of separate moving particles. 3. So the observation shows matter is particulate in nature, which is the kinetic theory of matter. 4. It says nothing about weight, since some matter is heavy and some light. 5. Nor does it fix a state: the same matter can exist as solid, liquid or gas depending on conditions. _Source: NECTA CSEE 2022 Chemistry 032, Question 1: Multiple Choice Items, item (iv)_