Which of the following is the most susceptible to damage by pollution in the air and precipitation

A. The roots of trees
B. Trees at high elevations
C. Birds that migrate seasonally
D. Plants that grow in lakes or rivers

B) Trees at high elevations

Explanation:

The atmospheric conditions and precipitation toxicity is most likely to affect trees at high elevations more so than the other answers.

The tree leaves, which are the main key to the tree's photosynthesis, absorb the oxygen and Co2 from the air, which are converted into nutrients. Without proper nutrients, the trees may die out.

the index of refraction of the second medium is higher. i just took the test trust me !

answer:   option a) glucagon was secreted by his pancreas before he ate the cookies because blood glucose was low. insulin was secreted after he ate the cookies because his blood glucose was high.

explanation: