4. Which of the following statements is most accurate about population patterns of the United States?

a. The western half of the United States is more populated than the eastern half.

b. The states with the fastest growth are found along the Mississippi River.

c. Population growth has occurred relatively evenly throughout the country.

d. Pull factors (such as economic opportunities and weather) have caused migration
from the Midwest to the Sun Belt.

Which is an accurate description of the physical characteristics of poland? its fertile soil is found only along riverbanks, and its mountainous region in the northwest has few mineral resources. it is mostly flat with fertile soil except in the east and northeast, and the mountainous region in the south has large deposits of coal and copper. it is covered with thick forests, and it has large reserves of coal, petroleum, and natural gas. its landscape is dominated by plateaus, mountains, and high ridges, and it has large deposits of sulfur and copper in the northeast.