Large size is a characteristic that tends to lead to the overexploitation of animals.

Coral bleaching results in ________.

A. the death of many corals B. the expulsion of zooxanthellae from corals C. the weakening of corals and higher levels of disease D. All of these are correct. E. None of these is correct.

What does voyaging offer people?

a. Expansion of trade b. Increased availability of food c. Mobility of residence d. All of these choices

The end of the Earth may come in about how many years, when the Sun runs out of fuel and becomes a red giant?

a. 100 million years b. 2 billion years c. 5 billion years d. 10 billion years

Desertification is affecting over a billion people worldwide

Indicate whether the statement is true or false