I need help ASAP !!I have to fill in the blank but I do not get this at all :/.

d is the correct answer.

b is incorrect because it makes food by itself

c is incorrect because us humans don't know how to produce their own food using the sun like plants.

a is incorrect because consumers can depend on carnivores for eating food for consumers to eat the dead organism. same thing with omnivores.

answer; cattle ranching on the savanna,and forestry in the amazon;