What is happening in step 4 in the image below?

1. Upwelling of warming ocean water.

2. Formation of an ocean gyre..

3. Formation of a surface ocean wave.

4. Sinking of cooling ocean water.

What is happening in step 4 in the image below 1 Upwelling of warming ocean water2 Formation of an ocean gyre3 Formation of a surface ocean wave4 Sinking of coo class=