Oxygen is taken from the water by

Explanation:

Humans use their lungs to inhale oxygen from the air. But worms, fish, crabs and other underwater animals use gills to get oxygen from the water. As water moves across an animal's gills, oxygen is removed and passed into the blood. Gills work better when there is more oxygen in the surrounding water.

a and c are the answeres

c: warm water flows from the western tropical pacific toward south america. that should be the right answer! hope it .