how dose mutation and variation lead to evalution?

The correct spellings are does and evolution. 

Kindly refer the links below for answer to similar queries

https://www.meritnation.com/ask-answer/question/with-an-example-explain-how-variation-leads-to-evoluti/science/3913303

https://www.meritnation.com/ask-answer/question/list-two-characteristics-of-mutation-that-helps-in-explainin/evolution/3135939​
 
 
 
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