A volcano is a vent in the earth's crust. The vent of volcano release lava, hot molten rock fragments, hot vapor and gases.
The valley that forms due to the movement of the tectonic plates is called rift valley. The formed valley is flat, narrow, and has steep sides.
A crater is an area on the Earth, or on any planet or on moon in the form of bowl-shaped depression which happened due to impact of a meteorite or an explosion or may be due to volcanic activity.
