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.

When new rock is added to an oceanic ridge, the magnetized strips on either side of the ridge are evidence of sea-floor spreading. this is because the rocks on the two sides of the ridge o are equal in width and in polarity are polar opposites oare magnetized vary in width but are equal in polarity