Need help:

answer choices: A: a cell, B: an organ system, C: an organ, D: a tissue

Identify the missing parts of the carbon cycle

Im is in a crowd of people at the mall looking for his girlfriend tammy, who was supposed to meet him for dinner. jim realizes tammy is across the room as he catches a whiff of her overpowering perfume, 'paris #6'. which process explains why jim is able to smell the perfume?

Which muscle is responsible for inhalation ?