A king divides his lands among his nobles thereby gaining their loyalty and support. Those nobles in turn would provide for peasants who would work the land. This is an example of

The greenhouse effect occurs when

a. the burning of fossil fuels releases too much carbon dioxide into the air, causing the earth's climate to warm. b. the overuse of water from the Edwards and Ogallala aquifers threatens access to water in the future. c. photosynthesis in plants causes the growth of dangerous algae, threatening the life of fish and other water animals. d. overreliance on wind energy causes the average temperature to rise downwind of the wind farms. e. coal burning plants in Mexico cause air pollution to drift into Texas.

According to the Constitution, the Supreme Court includes how many justices?

a. six b. nine c. 10 d. 12 e. The Constitution does not indicate the number of justices to serve on the Court.