Final answer:
The blue text in the chart is used to highlight important information and aid in understanding the central idea of the text.
Step-by-step explanation:
The blue text in the article 'Before Giving to a Charity' in the right-hand column is used to highlight the most important information.
By using blue text, the chart effectively draws attention to the key points and helps readers focus on the essential details.
This formatting choice aids in understanding the central idea of the text and makes it easier for readers to grasp the main concepts.