Answer:
D) friction between wind and surface water
Explanation:
I believe
Answer:
Medulla
Explanation:
The medulla is responsible for our involuntary actions, one of which is our heart rate.
Involuntary action means we do not intentionally do it ourselves; it is one of our unconscious processes, such as breathing.
We need water to survive and so do plants if there is pollution plants would die and people would get sick. Also the animals would also get sick and even die.
It represent the x axis the independent variable