They are different because of there population or because of there environment but they are also the same because they both are strongly reliant on agriculture for there exports and income!! Hope that helped:))
The waves crash into the sand, sometimes creating dunes, and it can also wash some sand out into the ocean. Hope this helps!
The Northern European plain and lowlands of West Siberian Plains have a lot of differences in terms of their characteristics. The only similarity between the two would be the vast complex land that both of these lands have.
I hope this answered your question.