Answer :
Final answer:
The graduated measuring instruments typically made of metal or wood are steel rules, commonly referred to as rulers. These are commonly used in educational settings for measuring lengths in units such as inches, centimeters, or millimeters. The option b is correct.
Explanation:
The graduated measuring instruments that are usually made of metal or wood are primarily steel rules. When considering the question of which tool to use when needing a unit of measurement such as inches, centimeters, or millimeters, the answer would typically be a ruler. This is because a standard ruler, whether made of metal or wood, can measure length to the nearest millimeter, which fits the criteria for repeated measurements and single measurements with a graduated scale. Furthermore, despite the precision of tools like Vernier calipers and micrometers, which can measure to much smaller increments, in general educational settings, a ruler is the most common tool used for such measurements.
