Dr. alley is pointing to a brownish zone exposed in the low bluff along coast guard beach, cape cod national seashore. the brown zone is rounded on the bottom, flat on the top, rests on sand and gravel, and has sand dunes on top. in the lower picture, dr. alley is showing that the brown zone contains twigs and other organic material. what is the brown zone doing here? group of answer choices

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.

What can you learn about precipitation levels in south america from this map? brazil is experiencing a drought.it rains more in higher altitudes.peru received the highest level of rain.venezuela got less than 25 cm of rain. 

What are cutting "steps" or terraces