Final answer:
The feature to color code cells based on content is Conditional Formatting (option D). This allows color coding cells when they meet specific criteria and requires looking at rules and data to understand patterns. If colors don't appear, it may be due to criteria not being met or issues with the rules.
Step-by-step explanation:
The feature used to color code cells based on their contents is Conditional Formatting. This feature allows users to apply specific formatting to cells that meet certain criteria. For example, you can set up a rule to color cells red if the values are lower than a certain number or green if they are higher.
To explain patterns seen in conditional formatting, you would need to look up the data that influences the conditions set in the rules. This could include the ranges, specific values or thresholds, formulas, or any other parameters that trigger the color change. If colors fail to appear under some conditions, it could be due to the cells not meeting the criteria, the rules being set up incorrectly, or possible conflicts with other conditional formatting rules or features that prevent the color coding from being displayed.
Hence, the answer is option D.