The is a keyboard instrument that uses vibrating air columns to produce sound.

Organs

Explanation:

In the field of music organ is defined as the keyboard instrument which is operated by the feet and hands by the players.

In organ the air pressure produces notes with pipes which are arranged in the series that are organized in the rows which are scale like rows.

It is the oldest and largest extant repertoire in the category of western music.

Therefore an organ is a instrument tat uses vibrating column which produces sound.

d) physical means can be used to separate the components of air.

multiple allele inheritance is traits controlled by more than 2 alleles (ex: pigeons having 3 alleles of one gene govern their feather color).