Answer:
a
Explanation:
the kidney secretes an enzyme called rennin that helps to control blood pressure is not true the kidney does not secret rennin
From lowest to highest hierarchy it would be: planet, star, solar system, galaxy.
Answer:
Runoff is nothing more than water "running off" the land surface.
<h3>Explenation:</h3>
Just as the water you wash your car with runs off down the driveway as you work, the rain that Mother Nature covers the landscape with runs off downhill, too (due to gravity). Runoff is an important component of the natural water cycle.
