Complete the following sentence.

weather and are homophones.

a) loaves
b) mows
c) garments
d) whether

The word 'whether' is the missing word.

Homophones are words which sound the same but look and are spelt differently.

eg. two, too, to
      pear, pair
      whole, hole
      right, write
etc.

The spontaneous creation or variation on an established theme within an artistic work is known as improvisation.  A rhythm that emphasizes the off or irregular beats is known as syncopation.

Explanation:

Improvisation is considered an interpretive resource that demonstrates the spontaneity of the artist through the creation or spontaneous variation of a theme established within an artistic work. In music, syncopation is a rhythmic figure characterized by the execution of sound in a weak time, or weak part of time that extends to the strong time, or next strong part of time, creating a displacement of the rhythmic accentuation, in other words, is the rhythm that emphasizes the off or irregular beats.