Correct option is A
Correct Answer: Option 1
Explanation: According to David Tilman’s R* hypothesis, each species has a minimum requirement (R*) for a limiting resource. In competition, the species that can persist at the lowest R* for a given resource will exclude others for that resource. Stable coexistence is possible when different species are limited by different resources within the same resource set, allowing niche differentiation rather than equal limitation or fixed usage ratios.
