Please Help: Social Studies! (Multiple Choice, Two Questions) 4. Which of the following presents an analysis of how people in a given region have adapted to their physical environment?
a. People from the frozen tundra regions of Russia & Canada grow grain crops using irrigation & windmills to pump water.
b. Due to a lack of water for drinking, people in SW Asia have developed methods of desalination of seawater as a fresh water source.
c. People in N. Africa often construct houses of wood, stone, & brick as a way to use building materials that naturally occur in their environment.
d. People in North America have created dams to generate electricity for nearby cities.

5. Which of the following best describes a cause & effect relationship between a modification of the environment and the result of that modification?
a. Improvements in air-conditioning allows individuals to live & work in warm climates.
b. Farmers settle in flat, fertile, valleys & plains to grow crops
c. Irrigation leads to increased crop production in normally arid places.
d. Builders in earthquake zones embed steel reinforcements in homes.