What do the two Frida's in the image above represent?​

The Frida on the left, in the white dress, represents her European identity, and the Frida on the right, in a traditional Mexican peasant dress, represents her Mexican identity.

Explanation:

earliest

neumes above text

neumes

colored lines

neumes

4-line staff

f, c, or g clef

notes on 5-line staff with clef

mensuration (longas and breves)

time signature (perfect or half circle)

most recent

notes on 5-line staff

modern clefs

modern note values (whole, half, quarter, and so on)

modern time signature

italian words and abbreviations for dynamics and tempo

staccato, slurs, and so on

c. landscape orientation