Final answer:
During the Continental Congress's meeting in 1775, the significant event was the attempt at reconciliation with Britain which failed, leading to the drafting of the Declaration of Independence, which was later signed and officially adopted in July 1776.
Step-by-step explanation:
Significant Event During the Continental Congress's Meeting
The significant event that occurred during the Continental Congress's year-long meeting before independence was discussed was the signing of the Declaration of Independence.
During the Continental Congress's year-long meeting in 1775, before the discussion of independence, the significant event that occurred was neither the signing of the Declaration of Independence nor the drafting of the U.S. Constitution, nor the Boston Tea Party. The Articles of Confederation were not adopted until later. However, the Continental Congress decided to make one final attempt at reconciliation with Great Britain, which ultimately failed, leading them towards independence. Eventually, this resulted in the drafting of the Declaration of Independence, which wasn't signed until July 2, 1776, and officially adopted on July 4, 1776.