describes a situation where a third party, outside the transaction bears the cost from a market transaction by others. A negative externality
A positive externality
A spillover
A market failure

Explanation is in the file

cutt.ly/Kzv78uJ

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.

i think the answer is true : ))