The harp is the official symbol of Ireland. The shamrock is a common symbol used to represent Ireland, though not the official one. Green can represent Ireland. The sports of Gaelic Football and Hurling, Ireland's two national sports, can represent Ireland. St. Patrick's Day events, like parades, can represent Ireland. These are some of the things, but there are others, like music.
They represent the flags of England, Scotland and Northern Ireland.
12 MEPs represent the Republic of Ireland. 3 MEPs represent Northern Ireland. See the related question below.
The UK flag represents the unification of England, Scotland, and Ireland.
The snakes represent the pagan gods that Patrick drove out of Ireland by converting much of the country to Christianity. There is no fossil evidence that snakes ever lived in Ireland.
Protestantism in Ireland.
The Republic of Ireland and Northern Ireland.
They represent Ireland in the European parliament.
A Song for Ireland. The winner of A Song For Ireland would then get to represent Ireland in Eurovision.
The Republic of Ireland has 11 MEPs. Northern Ireland has 3 MEPs.
Evil or paganism.
jade and green
The three items contained within the Ark of the Covenant are the stone tablets inscribed with the Ten Commandments, a jar of manna, and Aaron's rod. These items symbolize the covenant between God and the Israelites, God's provision and sustenance for his people, and the authority of the priesthood, respectively.