Pls don't answer with random letters.
how can a human modify a physical landform?

For thousands of years, humans have modified the physical environment by clearing land for agriculture or damming streams to store and divert water. As we industrialized, we built factories and power plants. ... This impacts the communities and wildlife located downstream who might depend on that water.

2. x2 + 8x + 12 = 0 to prove: x = -6 or x = -2