Respuesta :
The main vent is the main outlet for the magma to escape. Secondary vents are smaller outlets through which magma escapes. The crater is created after an eruption blows the top off the volcano
Explanation:
The magma chamber is a collection of magma inside the Earth,below the volcano. The main vent is the main outlet for the magma to escape. secondary vents are smaller outlets through which magma escapes. The creator after an eruption blows the top off the volcano.
I hope it's helpful!
