1. What are the major geographic features in United state?(Include major mountains, valleys, ocean lakes, and rivers.) Hlp

These factors threaten north americas ecosystems

Which country is the smallest island of the greater antilles

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.