How do humans negatively impact environments as they spread into areas of natural habitat? Select four options. They use a large share of natural resources per person. They build roads and factories that contribute to pollution. They clear land by removing trees from forests and wooded areas. They practice conservation of land and resources when they move. They change waterways to reduce flooding and provide drinking water.

Which of the following statements best characterizes changes to agriculture in the united states since 1900? a. increased mechanization has reduced the need for labor.b. increased mechanization has increased the need for water, thereby increasing the need for labor.increased mechanization has increased the use of land, thereby increasing the need for labor.d. increased mechanization has increased food production, thereby increasing the need for labor. select the best answer from the choices provided.