Question

what resources can be found in the northern european plains? sand dunes for creating glass large fields of corn fertile soil and rivers for irrigation

Explanation:

The Northern European Plains have fertile soil (due to glacial deposits) and rivers (like the Vistula, Oder, etc.) that support irrigation for agriculture. Sand dunes for glass - making are not a typical resource here, and large - scale corn fields are not a defining resource of this region's plains in the same way as fertile soil and irrigation - capable rivers.

Answer:

fertile soil and rivers for irrigation