In animals, the nose enables the exchange of gases between the environment and the organism. What comparable structure do plants possess?

A. Chloroplast

B. Grana

C. Stomata

D. Thylakoid

C. Stomata

This is a simple matter of memorizing the definitions. So looking at each of the possible answers:

A. Chloroplast - photosynthesis takes place here. No gas exchange with the environment, so it's not the correct answer.

B. Grana - These are structures contained within the Chloroplast. So also not the correct answer.

C. Stomata - Plural of Stoma which are tiny pores in the skin of the leaf or stem of a plant that allows gas to enter and exit from the plant. Sounds like what the question is asking for. This is the correct answer.

D. Thylakoid - Some more structures within the Chloroplast. So also not the correct answer.