Step 1: Identify causes of biodiversity loss.
Biodiversity loss refers to the decrease in the variety of life forms on Earth. The primary causes are:
((A) Habitat Destruction.
Deforestation, urbanization, and industrial activities lead to the loss of habitats for various species.
((B) Climate Change.
The changing climate, due to human activities such as burning fossil fuels, affects ecosystems and species' survival, leading to biodiversity loss.
Final Answer:
\[
\boxed{\text{Habitat Destruction, Climate Change}}
\]