21
which of the following statements is true of both ancient egypt and ancient sumer?
a. barley and wheat were both civilizations' main crops.
b. both civilizations were protected by the surrounding desert.
c. neither civilization was protected by geographic barriers.
d. neither civilization had predictable annual river flooding.
select the best answer from the choices provided.
0.000
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What major factors play a role in global warming? 1. human activity and normal climate conditions 2. natural factors and human activity 3. normal climate conditions and abnormal human activities 4. abnormal human activities and natural factors

According to the earth science reference tables, during which geologic time period were the continents of north america,south america, and africa closest together?

Paraguay is one of the only two countries in the americas that don't have a coastal border. the country is slightly smaller than california. it was under a military dictatorship for 35 years, ending in 1989; today it is a constitutional republic. most of the population is roman catholic, and over 60% of the people live in cities. its environment is threatened by deforestation and water pollution. which of the following facts from the paragraph above best describes an element of paraguay's culture? (apex)