Which of the following statements about resource use is true?
a. the use of renewable resources has no inherent costs.
b. resource use, whether renewable or nonrenewable, must be carefully managed to reduce the impact on the environment.
c. nonrenewable resources are used for energy, because there are no renewable resources that can be used as a source of energy.
d. the overuse of nonrenewable resources is less environmentally damaging than the overuse of renewable resources.

A is false because the renewable resources are expensive.

C is false because there are renewalbe sources used for energy like solar energy, water energy and wind energy.

D is false because it is known that the use of renewable resources are harmful for the earth. The rise of hydrocarbon use as an energy rised the CO2 level in the air.

B is the correct answer because the use of renewable energies must also be used with moderation because they can have a sound impact (the wind turbines that make a lot of noise) and visual (the water power plants present in the rivers)

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

in the year 2850, humans successfully colonized mars. the martian modules that were constructed could hold only a small population of people. it is now a century later, and the population on mars has grown to 600 people. of the current mars population, 45 people express the recessive phenotype for phenylketon- uria (pku) syndrome (pp genotype).

explanation: