Answer:
he body's first line of defense against pathogens uses mostly physical and chemical barriers such as sweat, skin, tears, mucus, stomach acid, and so on.
Explanation:
Answer:
Trees serve as natural filters so the effect on water quality would be so much you prob couldn't use or drink. it could also make to much water so the watershed could not handle it causing to create more rivers and more and multiple and frequent flooding, to much water, and other bad things.
Explanation:
#SaveTheTrees
Answer:
The Mackenzie River flows into Beaufort Sea and Arctic Ocean.
Answer:
The Sun
Explanation:
The sun does not move or rotate and hence cannot retrograde, however the other planets rotate. Some astronomers define retrograde motion as the Westward movement of the planets relative to the sun, based on this definition, all the planets experience retrograde movement. On the other hand, while some astronomers define retrograde motion as the movement that the other planets make when earth passes them while orbiting the sun. Based on this second classification, Mercury and Venus do not retrograde relative to the earth because they move faster than the earth.
