5. how do developed nations such as the united states play a part in rainforest
destruction?
a they turn to nations with rain forests for raw materials.
b they try to protect endangered species that live in rain forests.
c they collect medicinal plants from rain forests.
d they send people to rain forests to build homes.

i think it is d.

explanation:

image result for how many calories of energy will 20 grams of carbohydrates provide in one gram provides 4 calories

consuming the right balance of protein, carbohydrates and fat can you maintain a healthy weight and optimize your energy levels. protein and carbohydrates both contain 4 calories per gram, while fat provides 9 calories per gram.

in 1859, charles darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation. he defined natural selection as the "principle by which each slight variation [of a trait], if useful, is preserved".