ATP Synthase is a channel for protons to pass from and area of High concentration to an area of low concentration. This makes in an example of:
Active Transport
Filtration
Facilitated Diffusion
Osmosis
Exocytosis

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

thinking it would be d not too sure but i think it's right