The position of an organism in a food chain of an ecosystem called:

Explanation

Option A most likely refers to levels of ecology (since there isn't such a thing as level of ecosystem), which are organism, population, community, ecosystem, biosphere. Option B refers to a food chain which describes the linear transfer of energy from producers to consumers. Option C describes the interconnection of multiple food chains within a certain community. Option D is the correct answer, as it describes the position or the level of a certain organism in a food web or a food chain. Option E is a graphical representation of a food chain, which describes the energy levels and energy transfer from one trophic level to the next.