It's b because decomposers do not make food they break it down
Answer:
Cellular differentiation is the process in which a cell changes from one cell type to another. Usually, the cell changes to a more specialized type. Differentiation occurs numerous times during the development of a multicellular organism as it changes from a simple zygote to a complex system of tissues and cell types.
A.Humans use their knowledge to locate resources for them selves thereby reducing competition among them
