Answer:
D. The bars in a bar graph do not touch, while those in a histogram do touch.
Step-by-step explanation:
A histogram is used for continuous data, while bar graphs show discrete data, so the first option is already out of the picture.
Bars in a bar graph do not touch each other, while histogram bars have no gap in between, so the answer would be D.
Another is histograms are used for numerical data, while bar graphs are used for categorical.