The correct answer is A. Olive branch.
An olive branch is a symbol of peace and hope. It is often used in religious and cultural ceremonies, and it is also a popular symbol of peace movements. The olive branch is thought to have originated in ancient Greece, where it was used as a symbol of peace between warring factions. The olive branch is also mentioned in the Bible, where it is used as a symbol of God’s promise to Noah that he would never again destroy the world with a flood.
The olive branch is a powerful symbol of peace because it represents the hope for a better future. It is a reminder that even in the midst of conflict, there is always the possibility of peace.
The other options are not as closely associated with peace as the olive branch. A green light is a symbol of go or permission, while a lotus is a symbol of purity and enlightenment. A red flag is a symbol of danger or warning.