Final answer:
The Second Continental Congress accomplished several important tasks, including the establishment of a continental army, the issuance of the Olive Branch Petition, and the formation of committees to draft and approve the Declaration of Independence.
Step-by-step explanation:
The members of the Second Continental Congress accomplished several important tasks during their meeting in Philadelphia. One of their major achievements was the establishment of a continental army and the appointment of George Washington as its commander-in-chief. They also issued the Olive Branch Petition, a final attempt at reconciliation with Britain, and formed committees to draft and approve the Declaration of Independence, which would declare the colonies' independence from Britain.