Many parasites cause more harm to the host than just feeding alone
because...
A. many parasites transmit disease.
B. many parasites become 'part' of the host
organism.
C. many parasites return with swarms.

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

c is the answer : )               your welcome