13. what is the result of magma cooling and solidifying?\nformation of sedimentary rocks\nformation of…

Brief Explanations:

When magma cools and solidifies, it forms igneous rocks. These rocks can contain valuable minerals. Sedimentary rocks form from the accumulation and compaction of sediments, not from magma cooling. Magma cooling doesn't increase volcanic activity; rather, volcanic activity is related to magma movement and eruption. Magma cooling doesn't reduce mineral deposits; in fact, it can concentrate minerals in igneous rocks.

Answer:

Formation of igneous rocks containing valuable minerals