Final answer:
Wampum belts represent and commemorate peaceful agreements among Native American groups in the Northeast region. Correct option is C.
Step-by-step explanation:
Wampum belts or other forms of symbolism, depending on the nation, represent and commemorate peaceful agreements. Native American groups in the Northeast region began manufacturing wampum belts with white and purple shell beads to record important events and to formalize agreements. Exact copies of the belts would be made for each party participating in the agreement, and wampum was highly valued.