The document discusses comparison and contrast as a writing technique. It explains that comparison shows similarities while contrast shows differences between two or more subjects. Keywords that indicate a comparison/contrast assignment include "compare and contrast" and discussions of similarities/differences. When using this technique, writers must establish a basis for comparison by selecting subjects with enough commonalities. They should then determine points of focus and develop a thesis stating the subjects and whether similarities or differences will be emphasized. The essay can be structured by discussing each subject separately or making point-by-point comparisons. Transitions are important to clearly signal similarities and differences to the reader.