Which of the following is a requirement for a pesticide to be approved for use?

The requirement for a pesticide to be approved for use involves undergoing safety evaluations. This process is critical because it ensures that a pesticide is safe for humans, animals, and the environment before it can be marketed and used. These safety evaluations assess the potential risks associated with the pesticide, including its toxicity, environmental impact, and effectiveness. Regulatory agencies, such as the Environmental Protection Agency (EPA), conduct these evaluations to ensure that any pesticide entering the market meets strict safety and efficacy standards.

The other options, while they may touch upon aspects of marketability or effectiveness, do not reflect the formal criteria necessary for approval. For instance, a pesticide does not necessarily have to be marketed without restrictions, as many are subject to specific usage guidelines and safety precautions. Additionally, low cost is not a criterion for approval, as the safety and efficacy of the chemical are far more critical factors regardless of its price point. Finally, a pesticide need not be effective against all pests; it can be targeted to specific pests, which can often enhance its safety and reduce negative impacts on non-target organisms.