What are the holes in a volcano which steam gases and molten rock come out of?

The holes in a volcano through which steam, gases, and molten rock escape are called vents. These vents can vary in size and shape, and they allow volcanic materials to be released during eruptions. The primary vent is often connected to a magma chamber beneath the surface, while secondary vents can also form around the volcano. Together, they play a crucial role in the volcanic activity and formation of landforms.