Question

what is the biodiversity crisis?
a animals in various ecosystems are wiping each other out due to lack of access to food
b there is an accelerated reduction in the variability of species on earth
c over time, the earth is moving further away from the sun, meaning there is less energy the earth
d communities of organisms are shifting from aquatic to terrestrial (land) areas, causing there to be less space and resources for existing terrestrial organisms

Explanation:

To determine the correct answer, we analyze each option:

• Option A: The biodiversity crisis is not about animals wiping each other out due to food lack. This misrepresents the concept.
• Option B: Biodiversity refers to the variety of species on Earth. An accelerated reduction in species variability (loss of biodiversity) is the biodiversity crisis. This matches the definition.
• Option C: Earth's distance from the Sun affecting energy is unrelated to biodiversity.
• Option D: Organisms shifting from aquatic to terrestrial areas is not the core of the biodiversity crisis.

Answer:

B. There is an accelerated reduction in the variability of species on Earth