What geological feature is located below an active volcano

The geological features that are usually present below an active volcano are as follow-

1) Mantle plume - This is the region containing a huge concentration of magma rising from the mantle-core boundary. This exerts huge pressure towards the surface of the earth thereby lifting the land and subsequently forms a volcano.

2) Magma chamber - These are chambers that are comprised of magma bodies and with the increasing pressure and temperature, they tend to rise up and form volcanoes.

3) D (i) ke - This are vein-like structures within which the magma moves upward with increasing force. They cross-cuts the country rocks.

4) Sills - This is a parallel vein-like structure along which magma flows and they are parallel to the country rocks. They are not that frequently found like d (i) kes.