Biodiversity loss refers to the loss of species and their ecosystems due to human activity.

• A. Habitat restoration
• B. Species expansion
• C. Biodiversity loss
• D. Genetic diversity increase

Answer: (C)

The idea here is that biodiversity loss means a decline in the variety and abundance of life, including the number of species and the ecosystems they form, usually driven by human activities such as destroying habitats, pollution, and climate change. The statement given aligns with this meaning, so the best answer is the term that directly names the phenomenon of decline in life’s diversity. The other options describe opposite or unrelated ideas: habitat restoration refers to rebuilding or improving habitats, not losing them; species expansion means more species or broader presence, not fewer; increasing genetic diversity is the opposite of loss, since it implies more variation rather than less. Understanding that biodiversity includes species, ecosystems, and genetic variation helps you see why “biodiversity loss” is the correct term for the described idea.