The single greatest threat to biological diversity is: A. the introduction of foreign species. B. air pollution. C. overexploitation. D. habitat loss. E. water pollution.

Option A) overexploitation

Explanation:

Overexploitation refers to the excessive consumption or usage of a particular resource(s) that is vital to the survival of living organisms.

Examples of resources that have been overexploited are:

- Forest trees

The uncontrolled falling of trees has deprived many animals (terrestrial and arboreal such as birds, monkey etc) shelter and food. Thus, their species has greatly reduced.

- Water

Human use of water and activities in rivers has led to the drying up of several water bodies forcing several species of aquatic organisms to struggle for survival, or even die and become extinct.

Others include atmospheric gases like oxygen, nitrogen, carbon etc

Thus, overexploitation is the single greatest threat to biological diversity