What would best conclude an essay comparing different genres?

a relevant quotation that focuses on the genres
an interesting anecdote related to the thesis of the essay
a summary of the main points of comparison and contrast
a solution to a problem mentioned in the thesis statement

A summary of the main points of comparison and contrast would be the most appropriate conclusion for an essay comparing different genres. This helps to remind the reader of the key information discussed throughout the essay and provides closure to the argument.