Plants on Earth provide food, some even provide shelter to some animals, and plants such as trees provide oxygen to the environment.
D. an arctic fox is brown in summer and white in winter
Answer:
Filtration, Reabsorption, Secretion: The Three Steps of Urine Formation. The kidneys filter unwanted substances from the blood and produce urine to excrete them. There are three main steps of urine formation: glomerular filtration, reabsorption, and secretion.
Explanation:
