How can competition influence resource use and species distribution?

• A. Increased growth and same distribution
• B. Reduced growth, altered behavior, or niche partitioning to reduce competition
• C. Instant extinction of one species
• D. No effect on resource use

Answer: (B)

Competition for limited resources changes how species use those resources and where they can persist in a habitat. When resources are scarce or overlapping, growth and reproduction can slow because energy goes toward competing rather than increasing. To cope, species may alter their behavior—like foraging at different times or in different parts of the habitat—or they may partition their niches, specializing in different foods or conditions to reduce overlap. Over time, these adjustments can shift where species are found, as they occupy different areas or microhabitats to lessen competition. That’s why the best choice describes reduced growth, altered behavior, or niche partitioning to reduce competition. The other ideas don’t fit because competition usually reduces growth or changes distribution, not increases it with no change in distribution, and it doesn’t automatically cause instant extinction; and there is typically some effect on resource use.