Which of the following terms describe the rate of formation of biomass in producers?

Primary production is defined as the amount of biomass or organic matter produced per unit area over a time period by plants during photosynthesis. Gross primary productivity of an ecosystem is the rate of production of organic matter during photosynthesis. Gross primary productivity minus respiration losses (R), is the net primary productivity (NPP).Secondary productivity is defined as the rate of formation of new organic matter by consumers. It includes GSP and NSP.