Sections of compare and contrast charts are dedicated to the two ideas' shared common traits or similarities. If you're using a Venn diagram, write the shared details at the intersection of the circles. mentioning these details in the shared rectangle you drew near the top of the column-style diagram. For example, include "cold-blooded" in this category when comparing reptiles and amphibians. When comparing the books "Stellaluna" by Janell Cannon and "Zipping, Zapping, Zooming Bats" by Ann Earle, keep in mind that both feature bats. As illustrated in this Compare and Contrast Chart, what you write in the similarities section is determined by what you are comparing.