Biosphere is a global ecosystem composed of living organisms and abiotic factors from which they derive energy and nutrients. And ecosystem is defined as structural and functional unit of the biosphere comprising of living and non-living environment that interact by means of food chains and chemical cycles resulting in energy flow, biotic diversity and material cycling to form a stable, self-supporting system

The diagram below shows a food web from the sea shore

The mussel can be described as

Options

A. Producer
B. Primary consumer
C. Secondary consumer
D. Decomposer

Answer

C