A. Restricting Input Values
B. Saving Files
C. Sorting Data
D. Creating Charts

• Controls what users can enter.
• Reduces data entry errors.
• Supports drop-down lists.
• Improves accuracy.
• Useful for forms and databases.
• Maintains consistency.
• Common in professional spreadsheets.
• Easy to configure.
• Enhances data quality.
• Important Excel feature.