Which statement best describes what Tessa should tell the class about the diagram

The dots represent that diffusion has already occurred.

Explanation:

Perfumes are nothing but gases when tesla spray it in a corner of room are given free access a room, their particles blend in with the particles of air. The particles of gas are allowed to move rapidly every direction. They in the end spread through the entire room to a area of low concentration from the high concentration.

Thus, the dots represent that diffusion has already occurred.

straight probes are used primarily for measuring flow as it is approaching the test area. its geometry allows the probe to be mounted so that it is in the direct line of airflow.