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.

1-Upwelling of warming ocean water.

Explanation:

As the water moves north, it mixes with warmer water near the equator and becomes less dense, allowing it to rise. This rising of water creates a slow upwelling, bringing nutrients carried by the water to the surface.

Upwelling is the 4th given step as mentioned in the lesson.

option a and d is the correct answer

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the corpus luteum secretes estrogens and progesterone. the latter hormone causes changes in the uterus that make it more suitable for implantation of the fertilized ovum and the nourishment of the embryo. if the egg is not fertilized, the corpus luteum becomes inactive after 10–14 days, and menstruation occurs.

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