The sentence that provides a good conclusion to the paragraph is building the Panama Canal proved to be a very difficult project.
A conclusion must be a perception constructed from the information presented in the paragraph. In this paragraph, we can see that the Panama Canal should cover a very extensive and complex area, in addition, it took almost 100 years and the participation of two countries to complete the canal. With this, the reader can conclude that the construction of the Panama Canal was something very difficult to complete.
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