What does washington believe must be done if national unity is threatened

nobles

explanation:

someone who has high morals and ideals or people who are royalty or who have good breeding. an example of noble is a person who is always honest and charitable. an example of noble is a king.

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.