Answer:
Various names have been applied what is known as the Vietnam War. These have shifted over time, although Vietnam War is the most commonly used title in English. It has been variously called the Second Indochina War, the Vietnam Conflict, the Vietnam War, and Nam. In Vietnam it is commonly known as Kháng chiến chống Mỹ (Resistance War against America).
3 I think but I'm not sure
The correct answer to the question is Environmental Protection Agency. The U.S. agency, Environmental Protection Agency, enforces environmental regulations, which helps people to interact with the environment in sustainable ways. Environmental Protection Agency also protects the human health and handles the legality of actions towards environment and health.