A scientist notices that the wildlife in a stream near an antifreeze manufacturing plant dies suddenly. The scientist tests if the stream is contaminated with antifreeze. This would be a(n):

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.