Question

the rougly spherical region of faint old stars and globular clusters in which the rest of the galaxy is embedded is called the galactic _________.

disk

ring

nebula

halo

bulge

Explanation:

The galactic halo is a roughly spherical region surrounding a galaxy. It contains faint old stars and globular clusters. The disk is a flat, rotating part of the galaxy. A ring is a circular structure. A nebula is a cloud of gas and dust. The bulge is a central, somewhat spherical - like dense region (but not as large - scale as the halo).

Answer:

halo