Final answer:
The provision in the Treaty of Paris 1763 was Ceding Florida to Spain.
Step-by-step explanation:
The provision in the Treaty of Paris 1763 was B) Ceding Florida to Spain. The treaty ended the French and Indian War and the Seven Years' War in America. It resulted in the British gaining control over territory east of the Mississippi River, including Florida, which was ceded to Spain. This provision established Great Britain as the dominant European power in eastern North America.