Final answer:
The purpose of unit conversion is a) to change an amount from one unit to its equivalent in another unit, using conversion factors to ensure accuracy.
Step-by-step explanation:
The purpose of a unit conversion is a. to change an amount in one unit to its equivalent amount in another unit. This process is crucial for ensuring consistency and clarity in measurements across different systems of units. For instance, someone using a European cookbook in the United States would need to convert measurements from liters to cups. Conversion factors are used during this process; they are ratios that relate equal quantities in different units, allowing for the accurate transformation of values. It's essential to apply these factors correctly, especially when dealing with areas and volumes, where the dimensions of units must follow algebraic rules, such as squaring or cubing.