The given situation involves Olivia entering a competition to build a fish-feeding device without using toxic materials. Let's analyze whether this scenario represents a criterion or a constraint:
1. Constraint because not being toxic to fish is a design principle:
- This statement is incorrect. Design principles typically guide the overall approach or philosophy behind a design, rather than restrict specific material choices.
2. Criterion because limitations on materials are criteria:
- This statement is accurate. In this context, the requirement of not using toxic materials serves as a criterion. Criteria are standards or requirements that must be met in a design. Here, the limitation on materials (non-toxic) serves as a criterion for the fish-feeding device.
3. Criterion because not being toxic to fish is a design principle:
- This statement is not entirely accurate. While designing a product to be safe for fish may align with certain design principles related to animal welfare or environmental sustainability, in this specific case, it primarily functions as a criterion.
4. Constraint because limitations on materials are constraints:
- This statement is partially correct. Limitations on materials can indeed be considered constraints in design. However, in this specific scenario, the emphasis is more on meeting a specific criterion (non-toxicity) rather than being a broad constraint on material choices.
Therefore, in the context of the question, the most suitable selection would be:
Criterion because limitations on materials are criteria.
This choice correctly identifies the requirement of using non-toxic materials as a criterion that must be met in Olivia's fish-feeding device design.
