Which criterion is used to classify tools in a basic set?

• A. Their use
• B. Their material
• C. Their color
• D. Their age

Answer: (A)

Tools in a basic set are grouped by what they are used for—their function. This makes it quick and clear to grab the right tool for the job, supports safe use, and keeps work efficient. Color, material, or age don’t reliably indicate how a tool should be used: color can be just appearance, material tells you about durability but not the task, and age doesn’t reflect current condition or purpose. So organizing by use is the best approach.