<u>Answer</u>: B. Basic needs, such as food and water, will be scarce.
As the population increases, the resources necessary to feed the additional persons will also increase. However, basic resources such as food and water are not unlimited. Some countries have more and some less.
Thus, the amount of available drinking water will decrease as well as the available farmland. Due to more mouths to feed, food insecurity will increase as it is uncertain if it is possible to adequately feed the new population.
Decline in the global population of amphibians is due to multiple reasons which include:
A moist ecosystem is necessary for amphibians especially for the purpose of their reproduction. The drainage of the wetlands deprives them of their habitat.
Pollutants adversely affects the survival of the gametes, tadpoles or the adult amphibians by acting as toxic agents and inhibiting their normal metabolic function.
Infectious diseases often cause their death resulting their population to decline.
Global climate warming affects their normal metabolic growth and development and hence causes their population to decline.
