Which big five personality trait was at the top of the list of the mate preferences chart for both genders?

The big five personality trait that both genders placed as the highest on their preference list are Agreeableness.

Agreeableness is the tendency to be empathic and cooperative towards others. It could be considered as the opposite of being suspicious and lacking trust towards others. This is often considered as key in a relationship due to the fact that it is a behavior that supports open communication and understanding between couples.

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.