Identify each example on the diagram as a carbon source or a carbon sink.

In this order from left to right: carbon sink, carbon sink, carbon source

Explanation: i took the edmentum test

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

d. planting trees

the trees take in carbon to make oxygen.