Question

1. summarize the factors that affect the formation of magma.

Explanation:

Magma formation is affected by temperature, pressure, and the presence of volatiles. Rising temperature can melt rocks to form magma. Decreasing pressure (decompression melting) can also lead to magma formation as it reduces the melting - point of rocks. Volatiles like water lower the melting - point of rocks, facilitating magma formation.

Answer:

Temperature, pressure, and presence of volatiles affect magma formation.