C) the similarities and differences between two ideas
A Venn Diagram is created by drawing two overlapping circles. The circles do not overlap each other completely, only about half way. Then each of the circle is labeled with each of the ideas. The differences are in the parts of the circle that do not overlap while the similarities in the ideas are in the parts of the circle that overlap. For example, if you were comparing birds to mammals, one circle would be labeled birds and the other mammals. In the birds only part of the bird circle one might write feathers, wings, beaks, and hollow bones. In the mammals only circle on might write fur, drinks milk, and ears that stick out. The part of the circles that overlap to show the similarities between birds and mammals could have warm blooded, spine, and lungs.
