Relative to the five fundamental themes of geography, the Cienega de Santa Clara, an ecotourism destination on the Colorado River delta, is best described within which of the five themes?
A) location
B) place
C) human-Earth relationships
D) movement
E) regions
Question 2
The earth's current population is approximately:
a. 3 billion
b. 6 billion
c. 10 billion
d. 20 billion
