Which of the following is a component of the principal label?

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The main piece shown on the front of a pesticide container includes the net contents, which tells you exactly how much product is in the package. This information is essential for handling, pricing, and applying the product correctly, so it is included on the principal label—the primary part of the label that people see at a glance. The other items—how to use the product, first-aid steps, and toxicology details—are important safety and use information, but they appear on other parts of the label (back or side panels) rather than on the front-facing principal label. So, the net contents is the component that belongs on the principal label.