A stony tube that runs up the center of a volcano and has many branches through which lava flows during an eruption is: B. vent.
A volcano can be defined as a cone-shaped landform that is typically formed through repeated eruptions over a period of time. Also, a volcano is an opening that forms within the Earth's crust through which ash, lava, and gases flow during an eruption.
In Geology, a vent is a terminology that is used to describe a stony tube that runs up the center of a volcano and has many branches through which lava flows during an eruption.
Read more on volcano here: https://brainly.com/question/440765