The criminologist who studies general causes of homicides seeks explanations, whereas the detective who investigates an individual homicide seeks explanations.

The criminologist who studies general causes of homicides seeks Sociological Explanations for causes of crime and also the sociological view on how the criminal justice system, including police, prosecutors, and judges, responds to victims and offenders.

whereas

Detectives investigates individual homicide to determine if evidence is sufficient to recommend prosecution.

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.