Changing from the nature to a minor key signature in a composition can have what effect would it be? It can change the mood of the peace. It indicates instrumentation changes. It can change the full range of notes that can be played. It indicates to play the composition at a lower level.

Changing from a major key signature to a minor key signature in a composition can have the effect of changing the mood of the piece. Minor keys generally create a more melancholic or somber atmosphere compared to major keys, which often evoke a brighter or happier mood. This change in mood can greatly impact the emotional impact and overall expression of the composition.

Changing the key signature does not directly indicate instrumentation changes. Instrumentation refers to the choice and combination of specific instruments used in a composition, which is independent of the key signature. However, different key signatures may lend themselves better to certain instruments or instrumental combinations due to their characteristic tonalities.

Changing the key signature does affect the full range of notes that can be played. Each key signature has a specific arrangement of accidentals (sharps or flats) which alter the pitch of certain notes. By changing the key signature, the available notes and their tonal relationships within the composition may shift, resulting in a different musical color and harmonic structure.

Changing the key signature does not indicate playing the composition at a lower level. The level or volume at which a composition is played is typically indicated by dynamics markings (such as "forte" for loud or "piano" for soft) rather than the key signature.