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Q-how did europe's many navigable rivers and mountains affect European people during medieval times?

The natural process that created the fjords were the glaciers that carved them years ago. How did mountains and rivers make it difficult for one group to control all of Europe? Mountains and rivers made it difficult for one group to control all of Europe because they divided Europe.

Explanation:

No its because Major rivers, such as the Rhine, Danube, Seine, and Po, flow from inland mountains into the oceans and seas surrounding the continent. These rivers are navigable, or wide and deep enough for ships to use. ... As a result, these people were far enough away to be largely safe from the many wars fought on Europe's mainland

Explanation:

productive most commonly means: achieving or producing a significant amount or result.

explanation:

productive can also mean:

these depend on how the word productive is used. most likely productive will mean   achieving or producing a significant amount or result.

the vibration from the sound waves messed with the glass and it shattered.

hope this .