Concept:Biodiversity refers to the variety of all life forms—from genes to ecosystems—and the ecological processes that sustain them. Conservation protects this entire web of life, which includes every living thing.Explanation:Conservation of biodiversity is vital for all organisms, not just animals or plants. It includes microorganisms, fungi, and all life forms along with their interactions. Biodiversity supports food security, genetic diversity, and ecosystem stability. The three main objectives of biodiversity conservation are: preserving species diversity, sustainable use of species and ecosystems, and maintaining life-supporting systems. Since all organisms depend on each other, neglecting any group can disrupt the entire natural balance. Therefore, conservation efforts must cover all organisms on Earth.Answer:D. Organisms