Which pest leaves gnaw marks and builds nests in food establishments?

• A. Rat
• B. Rodent
• C. Mouse
• D. Squirrel

Answer: (B)

Pests that leave gnaw marks and nest in food establishments are rodents. Rodents have continuously growing incisor teeth, so they gnaw to keep those teeth worn and to access food. They build nests from materials like paper, fabric, and insulation in hidden spots such as behind appliances, inside walls, or in storage areas. In a kitchen or food-handling setting, you’d look for signs like torn packaging, chew marks, droppings, and nesting sites—clear indicators of rodent activity. While rats and mice are specific examples, they’re both rodents, and that broad category best fits the behavior described. Squirrels can gnaw and nest, but they’re not typical residents of commercial food spaces, making rodent the most appropriate match.