The central idea is that using solar power is better for the economy, environment, and society.
Answer:
A map!
Explanation:
Because, well, logics right!
Answer:
25. The reason the same musical note sounds different when played on various instruments is because the harmonic overtones and envelope of each instrument is unique. When a frequency is played, other frequencies, called harmonics, are created. Each instrument has a unique harmonic character.
26.
27.