Which of the following does not contribute to water pollution?
a. forestry
b. industry
c. agriculture
d. none of the above
user: which of the following typical adaptations of marine animals is not found in sea otters?
a. streamlined body
b. webbed hands and feet
c. body covered in thick fur
d. breathing apparatus on the top of the head

Question 1:
The answer is d. none of the above.

All mentioned factors contribute more or less to water pollution. Forestry, by removing trees from some area, increases the risk of erosion. The industry is a great water pollutant. Its facilities throw away waste into the water. Agriculture affects water quality by degrading Earth's surface and groundwater through erosion.


Question 2:
The answer is d. breathing apparatus on the top of the head.

Sea otters live both on land and in the water. They have streamlined body and webbed hands and feet, like the other marine mammals. They also have a thick fur. Since they can live on the land, they don't have breathing apparatus on the top of the head, like the other marine mammals (dolphins, whales) that cannot leave out the water.

The return of the wolf to yellowstone national park will probably affect the bird population to some degree, not significantly. while wolves will hunt birds when necessary, they prefer to hunt larger prey. the bird population will most likely only be affected when hunting is scarce for the wolves. birds of prey will also probably not be affected as much as other birds who spend more time on the ground hunting for food as the tend to spend more time in the air or in trees since they do not need to stay on the ground for long due to the nature of the way they hunt.