_____________ is (are) required, by law, to be on all food labels.

The quantity is a requirement by law to be included on all food labels. This is essential because it provides consumers with critical information about the amount of product they are purchasing, allowing them to make informed decisions regarding serving sizes, nutritional value, and cost-effectiveness. The quantity is typically expressed in weight or volume (for instance, ounces, grams, liters, or milliliters) and helps ensure transparency and consistency in food labeling.

Including the quantity on food labels serves regulatory purposes as well, ensuring that all manufacturers provide the same essential information, thereby helping to maintain fair trade practices and consumer protection. It allows consumers to compare products more easily while making shopping decisions.

In contrast, while preparation instructions, suggested uses, and product prices may be helpful for consumer decisions or preferences, they are not legally required on food labels, which differentiates the necessity of listing the quantity.