European civilizations developed slower than the fertile crescent because a. plentiful rainfall made large-scale irrigation projects unnecessary.
Most of Europe was blessed with enough rainfall to grow their crops as opposed to the fertile crescent which did not have much rainfall.
The people in the fertile crescent resorted to large scale immigration projects to get water from the Tigris and the Euphrates which made them more technologically advanced and developed compared to Europeans.
Find out more on the fertile crescent at https://brainly.com/question/882696.
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