Which does the enzyme need to be fully functional

Enzymes have one function only, and work like a key that fits in a lock. To be fully functional, the enzyme should have active sites for the substrate to fit. Only when the right enzyme finds the right material it can work fully. Hope this answers the question.

Humans can affect weathering and erosion in several ways.  humans cause  increases in acid rain and pollution, which increase the amount of  weathering  agents in the air and water, and then on land.for an easy answer: 1) acid rain2) pollution