C. Biodiversity increases with abundant resources and decreases when resources are scarce.Biodiversity refers to the variety of living organisms in an ecosystem. When resources such as food, water, and shelter are abundant, more species can thrive, leading to higher biodiversity. Conversely, when resources become scarce, competition increases, and some species may decline or disappear, reducing biodiversity. This pattern is observed in many ecosystems, including forests, grasslands, and aquatic environments.[tex][/tex]