Allows us to identify each instrument's distinctive qualities. it allows us to hear a difference in sound between a piano, clarinet, erhu, voice, or any sound.

The answer is Octave a symbol used to notate a pitch and its duration. Note is also used to identify a pitch or a tone. Octave is the interval between one musical pitch and another with half or double its frequency. It is defined by ANSI as the unit of frequency level when the base of the logarithm is two.

a. the moon was locked into orbit by the earths gravity as it was passing by and capture hypothesis i think

i feel as if they would both catch on before to long because they would see them to frequent