Which of the following statements best describes the population trends seen in north africa today?
a.
population size is staying about the same, and the average age is about 40.
b.
populations are growing quickly, and there are growing numbers of children and young people.
c.
population size is declining throughout the region, and countries must care for growing numbers of elderly people.
d.
population size is staying about the same, and the average age is under 20.

Which of the following is true about fossils? a. the relative age of fossils cannot be determined from their position in sedimentary layers. b. fossils found in lower layers of sedimentary rock are as old as fossils found in upper layers of sedimentary rock. c. fossils found in upper layers of sedimentary rock are older than fossils found in lower layers of sedimentary rock. d. fossils found in lower layers of sedimentary rock are older than fossils found in upper layers of sedimentary rock.

Which of the following statements about geographers' perceptions and perspectives is false? a. geographers avoid looking at the world with different perspectives. b. regions are a relative thing and a matter of perception. c. spatial distribution can be a matter of perception. d. mental maps are a way that people memorize and perceive the world around them. select the best answer from the choices provided. a b c d

Why is immigration so important today?