The U.S. took a more active role in preventing the spread of Communism in Latin America versus Asia or Europe because:

it was less expensive to fight Communism in Latin America.

the Soviet Union had more troops stationed in Asia and Europe, posing a greater military threat.

Latin America was closer to the U.S., so it was considered more essential to the country's security.

All of these choices are correct.

The U.S. took a more active role in preventing the spread of Communism in Latin America versus Asia or Europe because: "Latin America was closer to the U.S., so it was considered more essential to the country's security."

Latin America is characterized by the countries in the American continent that are mostly either Spanish or Portuguese speakers. The South American continent has various countries in which they speak either Spanish and Portuguese. South America is closer to the United States which is located in the North American continent.

Hence, because of the greater risks in the spread of communism near them, which is South America, the United States took a more active role in preventing the spread of Communism in Latin America versus Asia or Europe