Answer: The three main types, or classes, of rock are sedimentary, metamorphic, and igneous.
Explanation:
The differences among them have to do with how they are formed.
Answer
Igneous Rocks.
Metamorphic Rocks.
Sedimentary Rocks.
Answer:Many bacteria and fungi are important in the environment because they return energy to the environment
**see attached pic**
Weathering and soil formation.