Answer:
The correct answer is option A, Carnivores.
Step-by-step explanation:
In an ecosystem abiotic components like nutrients, water, sunlight, climate are essential for a producer to produce food. These producers are organism having chlorophyll in them i.e plants and trees. Once the food is produced , a consumer is required to consume the food thus herbivores are necessary as they only feed on plants and trees. Now if carnivores are removed from the ecosystem, the next stage would be the decomposition of dead animals and plants by the decomposes to bring back the entrapped nutrients into the soil again.
Thus, carnivores are not that important for survival of an ecosystem.