Respuesta :
The best answer to the incomplete statement above would be 'animal tissue'. While primary production refers to synthesis of plant material, secondary productivity refers to the synthesis of animal tissue - which mainly occurs on mammals, reptiles, and other animal forms.
The right answer is Animal tissue.
Secondary producers are heterotrophic beings, essentially animals and fungi whose role is to circulate the matter and energy stored in the biomass of primary producers.
To a large extent, it can be considered that the sphere of decomposers and mainly saprophytic bacteria of the mineralization belongs to the secondary producers.