Respuesta :
The net and gross primary productivity are the types of productivity in an ecological pyramid. The net primary productivity is the energy available for the consumers. Thus, option B is correct.
What is net primary productivity?
Net primary productivity (NPP) is the type of primary productivity that can be said to be the plant biomass produced through photosynthetic reactions. It comprises the intake and outtake of carbon.
The net primary productivity (NPP) is part of the ecological food web and chain. It is the energy that the consumer uses from the producers in a pyramid.
The net primary productivity can be defined as the subtraction of energy lost via respiration (R) from plants from the gross primary productivity (GPP) the energy used by plants. It is represented as,
NPP = GPP - R
Therefore, option B. the net primary productivity is the correct option.
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