Which statement best describes the effects of drought, desertification, and erosion on the people who live in the sahel on the edge of the sahara desert?
a) these factors have led to warfare between tribes in the region.
b) these factors have caused a great migration of people from the region.
c) these factors have caused the united nations to declare the region endangered.
d) these factors have led to hunger in the region because of a lack of arable land.

An atom of element a has 73 protons. what would the element's atomic number be?

China wants to take control over social media in which other region? question 4 options: taiwan chile japan hong kong

In e. c. tolman's experiment, some rats were trained to run through mazes for standard food goals, while other rats were allowed to explore the mazes for 10 days without food goals or other rewards. later, when food rewards were placed in a box at the far end of the maze, the previously unrewarded rats reached the food box as quickly as the rewarded rats after only one or two trials. this experiment demonstrated that the rats had the ability to form of their surroundings.