obsidian, shown below, is formed when volcanic lava flows into a body of water and cools rapidly. what type…

Brief Explanations:

Igneous rocks form from the cooling and solidification of magma or lava. Obsidian forms when volcanic lava cools rapidly, which is a characteristic of igneous - rock formation. Fossilized rocks contain remains or traces of ancient organisms. Metamorphic rocks form from pre - existing rocks that are changed by heat, pressure, or chemical processes. Sedimentary rocks form from the accumulation and compaction of sediments.

Answer:

C. Igneous rock