In an effort aimed at sustainable development, Northern Europeans have modified their unique environment to

Northern Europeans have gone great leaps to make their enviroment more sustainable.

Explanation:

For example. Norway is a global leader in hydropower production thanks to its many waterways and mountains, while Denmark is a global leader in wind energy production thanks to the fact that it is a very windy countryñ

Northern Europe is also one of the regions with the most bike use, for example, in Denmark, over a quarter of the population use bikes as their primary means of transportation everyday.

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c. islam and christianity

explanation:

islam and christianity are widely practiced in africa. islam is practiced due to its spread from the middle east into africa, and christianity is practiced due to the colonization of africa by the british empire.