Answer:
The three types of rocks are Igneous, Sedimentary, and Metaphoric.
Step-by-step explanation:
Igneous rocks are formed out of melted rocks deep inside the Earth. A distinguishing unique characteristic is that they are hard.
Sedimentary is formed from layers of sand, silt, dead plants, and animal skeletons. A distinguishing unique characteristic is that they are easy to crumble.
Metaphoric are formed when minerals change through heat and pressure underground. Two distinguishing unique characteristics are that they may have many layers and are noticeably hard.