Here are the answers to the questions you provided:
Question 1
A) The United States involved itself in Vietnam in the 1960s because:
Answer: It feared that if Vietnam became communist then surrounding countries would quickly follow.
B) How did the domino theory influence the United States' role in the Vietnam War?
Answer: It convinced the United States to become involved in the war.
Question 2
A) How does overpopulation in Indonesia affect the availability of clean water?
Answer: It increases pollution and reduces access to clean water.
Question 3
A) Why did the first inhabitants of mainland Southeast Asia settle in plains and river valleys?
Answer: Those areas were good for farming.
Question 4
A) What is a primary characteristic that differentiates religious groups from ethnic groups?
Answer: Religious groups are defined by shared beliefs and practices related to spirituality.
Question 5
A) What was the underlying belief that justified U.S. involvement in both the Korean and Vietnam Wars?
Answer: The thought that communism was a threat to democracy and freedom.
Question 6
A) What was a negative effect of the United States' involvement in the Vietnam War?
Answer: The death toll for American soldiers was high, and the American public were divided in their support of the war.
Question 7
A) By studying the map, which of these statements can be determined to be accurate?
Answer: Rivers provided a source of both irrigation and transportation.
Please let me know if you need further clarification or information!