Which term describes the variety of life forms in an ecosystem or area?

• A. The speed at which species reproduce
• B. Variety of life forms in an ecosystem or area
• C. The number of habitats in a region
• D. The amount of sunlight an area receives

Answer: (B)

Biodiversity is the variety of life forms in an ecosystem or area. It captures the range of species present, as well as genetic differences within species and the variety of habitats that support them. A place with many different kinds of organisms, like a thriving coral reef or a lush forest, has high biodiversity.

Think of it this way: the question is about how many different living things and kinds exist in a place, not about how fast they reproduce, how many types of habitats there are, or how much sunlight the area gets. Reproductive rate describes how quickly individuals reproduce, which isn’t about variety. The number of habitats relates to habitat diversity, not the total variety of life forms. Sunlight is an abiotic factor that influences which species can live there, but it doesn’t by itself measure variety.