Question

which of the following organism is considered to be the most important organism in an ecosystem? realized species tertiary consumer keystone species

Explanation:

Keystone species have a disproportionately large impact on the structure and function of an ecosystem relative to their abundance. They play crucial roles in maintaining the balance of the ecosystem, such as controlling populations of other species, influencing nutrient cycling, and shaping habitats. Realized species is not a term that directly relates to the most important organism in an ecosystem. Tertiary consumers are high - level predators but do not necessarily have as far - reaching an impact on the ecosystem as keystone species.

Answer:

C. keystone species