Magma is defined as:

Magma forms deep inside the Earth’s crust and mantle due to intense heat and pressure.
It results from the melting of rocks when temperatures exceed their melting point, often influenced by tectonic activity.
Composition:
Silicate minerals (mainly silicon and oxygen).
Dissolved gases such as water vapor, carbon dioxide, and sulfur dioxide.
Crystals of minerals that begin to solidify as magma cools.
Location:
Magma exists beneath the Earth’s crust in magma chambers.
When it reaches the surface through volcanic eruptions, it is called lava.
Types of Magma (based on silica content):
Basaltic (Mafic): Low silica, fluid, less explosive.
Andesitic (Intermediate): Moderate silica, medium viscosity.
Rhyolitic (Felsic): High silica, viscous, highly explosive.
Importance:
Magma is the source of igneous rocks when it cools and solidifies.
Drives volcanic activity, shaping landscapes and contributing to the Earth’s geological cycle.
In short: Magma is molten rock beneath the Earth’s surface, rich in minerals and gases, and the origin of volcanic activity and igneous rocks.