Which greenhouse gas is emitted when people burn fossil fuels for energy?
a)nitrogen
b)oxygen
c)carbon dioxide
d)helium

the correct answer is-

C) carbon dioxide.

Fossil fuels ( such as oil, coal, and natural gas that are formed by dead remains of life forms like animals and plants) are burnt in order to release the energy that is stored in them. This is also known as combustion and emits carbon dioxide, which is a greenhouse gas and contributes to the major global climate change.

Thus, option C) is the right answer.

the darker peppered moth species were favored due to the fact that the industrial revolution had made all the nearby trees a darker color instead of white.