Gender identity is best understood as being and sexual orientation is best understood as being

gender identity is best understood as being on a continuum and sexual orientation is best understood as being on a continuum .

Hope this answer correct :)

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.