Ireland is an island. So ports are focal points. They are key for industry, for importing, for exporting, for marine industries and so on. These are where the cities form. Ireland is not very wide, so this is different to massive countries that have cities spread all around them. Ireland does have lots of inland towns that are very large but cities form on the coast. Around the world, many large cities are on or near the coast too.
Ireland's capital i s Dublin. The main cities are: Dublin, Cork, Galway, Limerick, Belfast and to a lesser extent Derry.
Catholicism.
Christmas
The main lough is Lough Neagh.
Belfast
Ireland's main trading partner is Britain, if that is what you mean.
Agriculture probably
The Spanish Main was originally the coast from Florida around the Caribbean to the north coast of South America.
ireland's exports include:computer equipmentchemicalsmeatdairy productsmachineryUniversity graduates
Rosslare harbour dublin bay and the harbour in donegal
There is around severn main cities in the british isles!
Most of Ireland's cities are on or very near the coast, giving them access to the sea. This is important for importing and exporting. Some also have sea transport, such as ferries.