The title giving to people like Carnegie who invested their money to start business, such as his steel monopoly A. Entrepreneur
B. Nativists
C. Populist

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

"a.) well–developed vascular system."