a piece's "subject matter" refers to the

a.  symbols in an abstract work of art.

b.  content that comes from the objects or events in the image.

c.  shapes in nonrepresentational paintings.

d.  materials an artist used to create the piece.

That she has to go to a later concert and tour, but there will be new songs out by billie eilish by then

It depends on what type of third separates the three notes.for example: if you have two mayor thirds is an "aumented chord"if you have two minor thirds is an "diminued chord"if you have one mayor first and then one minor is a "mayor chord"and inverted is a "minor chord"