Aresearcher's efforts to remove influence of variables other than the independent variable is referred to as

Control

Explanation:

Control in research refers to setting up a certain group or implementing certain measures to ensure that the only variables influencing the outcome are the independent variables which have been included in the research. It is done to remove influence of extraneous variables. Extraneous variables are those which can affect the outcome of the research but have not been included in the current investigation for different reasons. Controls are of prime importance in medical research.

answer; researchers typically cannot control people's sexual behaviors as would be necessary in an experiment;

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.