The Diagram shows structures that form the surface of the trachea. Which level of organisation is the structure labelled S ?
A. Cell
B. Organ
C. Organ system
D. Tissue

answer; /// i believe the correct answer is (reactants);

relative humidity, temperature and dew point -- are bound together in the mathematical relationship below. relative humidity changes when temperatures change. because warm air can hold more water vapor than cool air, relative humidity falls when the temperature rises if no moisture is added to the air. so i would say a