Which two components make up the greatest percentage of the atmosphere?

Earth Atmosphere:

The earth atmosphere is composed of a number of gases or elements, as they are required to sustain the environment and air present in the atmosphere. As there are various portions of the air mixture, and most of the elements are present are in high level or number of molecules are in more denser form.

Explanation:

the fact that your name is twinkie makes me not wanna you at so im not

the correct answer is option b

behavioral response need communication and thus co-ordination at several levels such as interaction among cells, organ system and the entire organism.

behavioral response produces both internal and environmental stimulus.