What comprises the most inclusive components of the biotic portion of an ecosystem? 

A)  primary and secondary consumers 
B)  all chemicals or matter 
C)  herbivores, carnivores, and omnivores 
D)  producers and consumers

The biotic portion of an ecosystem is made up of living organisms, including producers (plants) and consumers (animals). Producers are the basis of all food webs and provide the energy needed for all other organisms in the ecosystem to survive. Consumers are then divided into primary, secondary, and tertiary based on their position in the food web. Therefore, D that comprises producers and consumers is the most inclusive component of the biotic portion of an ecosystem. Option A just includes some consumers; option B includes both biotic and abiotic components, while option C only includes different types of consumers.