wherever dietary fat consists mostly of fats and fish, fruits, and vegetables are eaten in abundance, blood cholesterol and the rate of death from heart disease are low.

The answer for the above question is the unsaturated fats.                                   Fats play a vital role in the body such as giving energy and also helping the body absorb vitamins. Dietary fats also play a major role in regulation of cholesterol levels in the body. Dietary fats consists of the saturated fats, trans fats, monounsaturated and poly unsaturated fats. 

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