Some south vietnamese aided the vietcong in their struggle to overthrow the government.
true
false

Geothermic gradient is the rate of increasing temperature with respect to increasing the depth in the earths interior. away from tech tonic plates boundaries, it is about 25-40 c/km (72-87 degrees f/mi) of depth near the surface in most of the world.

Answer they are produced by collision of tectonic plates;

Ido not see an image did you put one on here?