Apyramid of numbers differs from a pyramid of energy because it

It displays the succeeding and increasing form of number while pyramid of energy displays how energy is transferred (as it reduces) from one organism to another.

10 percent rule

Food chain refers to a process cycle from producer to consumer to decomposer.
Plants – herbivores – omnivores – carnivores Start -> Plants -> herbivore insect -> spiders -> small bird -> Snake -> hawk -> fox -> lion -> when died the body will be eaten by hyena-> when hyena died -> body get decompose and be eaten  by worms and the rest will be plant’s fertilizer.

The process of the food chain will then again takes place over and over again.

The truman doctrine was an american foreign policy whose stated purpose was to counter soviet geopolitical expansion during the cold war. it was announced to congress by president harry s. truman on march 12, 1947, and further developed on july 12, 1948, when he pledged to contain threats to greece and turkey

The correct answer is c