1. The problem asks which type of information is best displayed on a bar graph. 2. Bar graphs are ideal for comparing discrete categories or groups with distinct values. 3. Let's analyze each option: (a) Height of all preschool children - This is continuous data, better shown with histograms or line plots. (b) Amount spent on food by families - This is continuous and varies widely, better with histograms or box plots. (c) Number of different vegetables in a garden - This is discrete count data, suitable for bar graphs. (d) Income of all Americans - Continuous data, better with histograms or box plots. 4. Therefore, the best choice for a bar graph is (c) Number of different vegetables in a garden, because it involves counting distinct categories. Final answer: (c) Number of different vegetables in a garden.