Question

question 7 (2 points)
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minerals can form by all of the following processes except
precipitation from ions in a solution
crystallization from magma
spontaneous combustion
biological activity

Explanation:

Minerals can form through precipitation from ions in a solution (e.g., salt from evaporating water), crystallization from magma (igneous rocks), and biological activity (e.g., shells made of calcium carbonate). Spontaneous combustion is a chemical reaction that produces fire and is not a process for mineral formation.

Answer:

C. spontaneous combustion