Harmony is used to support the melody by using

a. tonic.

b. meter.

c. chords.

d. monophonic chant.

Harmony is used to support the melody by using chords. The harmony brings the music into place because of the chords that is used. These chords varies its melody depending on how high a chord is or how low it is. Together with that chord, brings the sound.

The answer is C. Chords

in music, chord is a harmonic set of three or more notes that played simultaneously.

In the C Scale for example, the harmony notes are E, G, and B