The correct option is A.
Resonance is the phenomenon by which a vibrating system or an external force drives another system to oscillate with greater frequencies at specific frequencies. These specific frequencies are called resonant frequencies. At resonance frequencies, small periodic driving forces have capacity to produce large amplitude oscillation.<span />
Answer:
D. Elevation
Explanation:
Elevation is the height of a point above or below sea level.
Elevation Definition
height above a given level especially sea level (and below)
(have a great day!)
C is correct, the charter is an unwritten but binding document
