Why did the united states send troops to vietnam?

Which statement best explains the role of government according to thomas hobbes

What do most climatologists see as a major cause of rising global temperatures? a. earth's closer proximity to the sun due to its gravitational pull b. greenhouse gases produced by burning fossil fuels c. rising ocean levels caused by melting polar ice sheets d. water pollution cause by industrial waste

Why is it important that dr. luther king jr. use non-violent protest to create social change?