Explanation:

- Option 1: Igneous rocks

- Correct Answer

- Form from the cooling and solidification of magma or lava.

- Two types: intrusive (cool beneath Earth's surface) and extrusive (cool on the surface).

- Option 2: Rock salts

- Not correct in this context.

- Form from the evaporation of saline water, usually in enclosed water bodies.

- Option 3: Metamorphic rocks

- Not correct in this context.

- Form from existing rocks that change due to pressure, heat, or chemical processes.

- Option 4: Sedimentary rocks

- Not correct in this context.

- Form from the accumulation or compaction of mineral and organic particles.

Igneous rocks are distinct because they start as molten material that cools and hardens.