Which of the following statements is true?

a. all fires are bad for a forest environment.

b. earth's water supply does not need to be protected from pollution.

c. the extracting of underground resources always leads to a healthy environment.

d. soil can be considered a resource.

answer: after carbon dioxide enters the leaf through stomata it moves into the mesophyll cells where photosynthesis occurs and glucose is constructed. respiration occurs when glucose (sugar produced during photosynthesis) combines with oxygen to produce useable cellular energy.

explanation:

primary succession occurs in essentially lifeless areas regions in which the soil is incapable of sustaining life as a result of such factors as lava flows, newly formed sand dunes, or rocks left from a retreating glacier. secondary succession occurs