Which term describes broad geographic zones with distinctive plant and animal life?

• A. Ecosystems
• B. Biomes
• C. Habitats
• D. Climates

Answer: (B)

The main idea being tested is how we categorize Earth into large life zones shaped by climate. These broad geographic zones with distinctive plant and animal life are called biomes. Biomes group regions by similar climate patterns—temperature and precipitation—and the vegetation they support, which in turn sustains characteristic animal communities. You can think of examples like tundra, deserts, tropical rainforests, temperate forests, and grasslands, which span large areas and share the same general life traits despite being far apart.

Ecosystems refer to the networks of living organisms interacting with their physical environment within a particular area, which can exist inside a biome. Habitats are the specific places where organisms live within an ecosystem, like a pond or a forest floor. Climates describe long-term weather patterns in a region, not the broad assemblage of life forms. So the term that best fits “broad geographic zones with distinctive plant and animal life” is biomes.