Nonhuman species are often essential to the health of the ecosystems that support human life. They provide important services like pollination, nutrient cycling, and pest control. Without these services, human life would become more difficult and expensive to sustain.

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Nonhuman Species Are

Question 10

Multiple Choice

Nonhuman species are

A) relatively expendable since other species with larger populations can take the place of any that becomes extinct.
B) often essential to the health of the ecosystems that support human life.
C) rapidly expanding their natural ranges and may soon threaten human activities like agriculture.
D) competitors with humans for the resources that make life possible.

Correct Answer: