Answer:
The connection between density differences in the Cosmic Microwave Background (CMB) and the formation of galaxies lies in the process of cosmic structure formation. The correct statement is: "The more dense regions would eventually become galaxies."
Explanation:
The Cosmic Microwave Background (CMB) shows tiny temperature differences across the universe, reflecting variations in density from the early cosmos. These differences acted as seeds for forming cosmic structures. Areas with slightly higher density, seen as warmer spots in the CMB, had stronger gravity, pulling matter together to create galaxies. Over time, these dense regions condensed into clouds that eventually formed stars and galaxies. This process, driven by the gravitational pull from CMB density variations, shaped the universe into the galaxy-filled space we see today. Studies of the CMB and galaxy surveys confirm this connection, highlighting the crucial role of early universe conditions in galaxy formation.