Correct the following sentence if it is correctly written:Extreme runners must be agile, strong, and skilled, not unlike other athletes; but they must also embody courage ...

The answer might be correctly written but it is not the proper way to write a sentence. It is important to write sentences in a correct and a manner in which people would feel comfortable reading it. The sentence can be written as " Extreme runners must be agile, strong, and skilled, not unlike other athletes--but they must also embody courage".