Which type of evidence would indicate that pests have accessed food storage areas?

The presence of black, greasy-looking marks is a strong indicator that pests have accessed food storage areas. These marks are typically left by rodents or insects as they navigate through the space, often resulting from oils and dirt that accumulate on their bodies. Such markings suggest that pests may have been foraging for food and potentially contaminating the area, thus raising concerns about food safety and the need for pest control measures.

Other options, while they might relate to the overall cleanliness and organizational aspects of the food storage area, do not specifically indicate pest activity. Piles of unwashed dishes could suggest poor sanitation but do not provide direct evidence of pests. Food items in original packaging and intact and sealed containers indicate that food is stored properly and have not been compromised, which is the opposite of suggesting pest access. Understanding these signs and maintaining good hygiene practices is essential for safe food handling.