Answer:
The correct answer for this Question is B
Explanation:
WIND AND WATER EROSION (B)

The correct choice is ~ A
Bikes don't require gasoline for their functioning, so it causes less air pollution.
The energy achieved I think
The colors that you see on the CD are created by white light reflecting from ridges in the metal. When light reflects off or passes through something with many small ridges or scratches, you often get rainbow colors and interesting patterns. They are called interference patterns.