Answer:
The mode that has 2 flats and begins and ends on "G" is the Mixolydian mode.
Step-by-step explanation:
The Mixolydian mode is a musical mode that is similar to the major scale, but with a lowered seventh degree. This mode is characterized by the lowered seventh scale degree, which gives it the characteristic "blue" sound. This makes it often used in jazz, blues, and rock music.