Answer:
The specificity principle.
Step-by-step explanation:
The Specificity Principle is a principle that states that exercising a certain body part, component of the body, or particular skill primarily develops that part or skill.
Specificity means being specific. Cate started by talking about hunger as a worldwide problem. That's not specific. She then proceeded to explain hunger problem in the U. S. This is still not specific enough. When she described a family suffering in her hometown, she is more specific thereby employing the specificity principle.