Based on the box-and-whisker plots for both Mr. Green's and Mrs. Violet's classes:

• Mrs. Violet's class has a minimum number of books read starting at 6.
• Mr. Green's class has a minimum number of books read starting at 0.

From the given options:

• The correct statement is: "Mrs. Violet’s class has a greater minimum number of books read than Mr. Green’s class."

Would you like to explore more about box-and-whisker plots or have any other questions on this topic? Here are some further points we could discuss:

1. How to calculate the range and interquartile range from a box plot.
2. Understanding how the median is depicted in a box plot.
3. The significance of the whiskers in a box-and-whisker plot.
4. Comparing the distribution of data in the two classes beyond the minimum value.
5. The impact of outliers on box-and-whisker plots.

Tip: When analyzing box-and-whisker plots, remember that the length of the box represents the interquartile range which contains the middle 50% of the data, providing insight into the spread and skewness of the data distribution.