Belarus
The three Baltic states are Estonia, Latvia, and Lithuania.
Lithuania is country near the Baltic sea. Its neighbours are: Latvia, Poland, Russia and Belarus.
Belarus is not a Baltic state but Ireland is a member of the EU.
No, Poland is not an island. It is a country in Central Europe with borders touching Germany, Czech Republic, Slovakia, Ukraine, Belarus, Lithuania, and the Baltic Sea.
Baltic.
Baltic.
Lithuania is bordered by Latvia, Belarus, Poland, Russia (Kaliningrad oblast) and the Baltic Sea.
Belarus to the Southeast, Baltic-Russia to the Southwest, Latvia to the North, Poland to the South and the Baltic Sea to the West.Latvia, Belarus, Poland and Russia (Kaliningrad Oblast).
Belarus is a country in Europe.
* Baltic Sea * Germany * Czech Republic * Slovakia * Ukraine * Belarus * Lithuania * Russia
The body of water would be the Baltic Sea. Three bordering countries could be e.g. Germany, Slovakia and Belarus. There are 7 countries bordering Poland in total. In addition to the ones I mentioned, it's also Czech Republic, Ukraine, Russia and Lithuania.