12. A primate's ability to hold objects in its hands/feet is an evolutionary development that allowed it to A. walk upright B. use simple tools C. gather food D. create elaborate social systems

Its B I took the test

Explanation:

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

b ti isnfornopgnoernfrof