It is called a crater.
It is called a volcano.
It goes through, a fault, crack, vent or hole on a volcano.
Do you mean the hole it comes out of the ground through? That is a volcano. More likely, you mean the hole made when the lava starts to cool and the liquid part inside can suddenly run out. That is a lava tube.
Central canal....
No. Volcano is a noun describing a mountain or hole in the ground through which lava, ash, and gas can erupt. Volcanic is an adjective that means "of, relating to, or produced by a volcano or volcanoes."
The hole in the center of the iris through which light can pass is called the pupil.
The large hole at the top of a volcano is called a "crater." It is formed when explosions or collapses create a depression at the summit of the volcano.
the planet doesn't need a volcano. The core of the earth is a hot fiery furnace. Volcanoes are just mountains with a hole in it to let the boiling fire out. If my answer is not correct don't call 12345678910
Such a hole is called a fumarole.
Vent .
Caldera
A volcanic crater is a large, basin-like depression at the summit of a volcano. It forms when the magma chamber beneath a volcano is emptied during an eruption, causing the overlying rock to collapse into the chamber. Craters can also be formed by explosive eruptions that blow out the summit of a volcano.