Final answer:
The three main types of rocky shores are igneous, sedimentary, and metamorphic.
Step-by-step explanation:
Based on how rocks are formed, geologists classify them into three basic types: igneous, sedimentary, and metamorphic. Igneous rocks form when magma or lava cools and solidifies. Sedimentary rocks form when broken pieces of other rocks from weathering processes get cemented together. Metamorphic rocks are pre-existing rocks that are altered by heat and pressure.