The memory system in which signals are held for a split second is called memory. short-term working sensory holding

Sensory Memory
It is the ability to retain impressions of sensory information after the original stimuli have ended

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

Iguess i would say diagrams would be most difficult subject too correct