Which became the world’s largest communications network in the early twenty-first century?

The Internet, is the correct answer.

Explanation:

The Internet is the global arrangement of interconnected computer networks that employ the Internet protocol suite to link devices universally. It is a chain of networks that comprised consists of public, private, business, academic, and government networks of regional to the global range, connected by an extensive array of electronic, visual and wireless networking technologies. The internet has become the largest communication network in the world in the early twenty-first century.

it's not the readmission

in which two ways were the northeast woodland indians and the southeast indians similar? both collaborated to form the iroquois confederacy. both cultivated the crops of corn, beans, and squash. both lived in rich environments of swamps and rivers. both lived in tree-bark dwellings called wigwams. both expected men to hunt, while women farmed.