Secondary productivity is the rate of formation of new organic matter by _____. Producer, Parasite, Consumer, Decomposer

The production of biomass in an ecosystem is known as ecological productivity. The biomass generated due to the primary producer is known as primary productivity. A parasite is an organism that withdraws nutrition from other organisms. The biomass generated due to secondary consumers is known as secondary productivity. These are generally known as heterotrophs. Decomposers are the organism which mainly decomposes the dead and decaying matter and derive the nutrition. So, the correct answer is option C.