Question

which is the #1 reason for the loss of biodiversity?
habitat loss
pollution
malnutrition

Explanation:

Habitat loss is a major threat to biodiversity as it directly affects the living spaces of various species. Human activities like deforestation, urbanization, and conversion of land for agriculture are significant causes of habitat loss. Pollution and malnutrition also impact biodiversity but are not as widespread and fundamental as habitat loss in causing species decline.

Answer:

habitat loss