Final answer:
Volcanic activity and rugged coastlines are more commonly found on European islands than on mainland Europe.
Step-by-step explanation:
On European islands, volcanic activity and rugged coastlines are more commonly found than on mainland Europe. For example, the Canary Islands in Spain have a volcanic origin and are known for their rugged coastlines. Iceland is another European island that experiences volcanic activity and has a rugged coastline.
Learn more about geographical features on European islands