On a topographic map, what is used to show elevation? relief blue lines b. contour lines d. an open circle Please select the best answer from the choices provided О А O B O C O D

Drastic boundary changes can occur for all of the following reasons except for a. a shift in the way a river flows b. the collapse of a government system c. a conflict between two neighboring groups d. one country's decision to sell land to another country select the best answer from the choices provide

According to the chart above, which of the following events occurred in los angeles between 1940 and 1970? i. the white population increased. ii. the hispanic and black populations increased. iii. the total population increased. iv. non-whites became a majority in the city. a. iii. and iv. only b. i., ii., and iii. only c. ii., iii., and iv. only d. i., ii., iii., and iv.

Thin layer of the air that surrounds earth