Final answer:
Josh's desk, at 36 inches tall, is equivalent to 1 yard; the unit of measurement changed when using a yard stick, but the actual height did not decrease.
Step-by-step explanation:
When Josh measured his desk with a yard stick, the number did not actually decrease; rather, the unit of measurement changed. Josh's desk is 36 inches tall, which is equivalent to 1 yard because there are 36 inches in a yard. This is why when he used the yard stick, which measures in yards, it showed the height as 1 yard tall. Both measurements are the same, but they are expressed in different units of measurement.
When selecting an appropriate measuring tool, it is important to match the tool with the size of the object. For measuring the height of a desk, a yard stick is appropriate because a desk is typically smaller than a yard in height, which means a yard stick can measure its full height without needing another measurement tool.