What natural sources do Red Flour Beetles predominantly infest?

Red flour beetles are primarily known for their infestation of stored food products, particularly those that are high in carbohydrates. Their natural sources of infestation include items like flour, grains, dried fruits, nuts, and other processed foods. This preference for food sources makes option B the most accurate response.

These beetles thrive in environments where food is stored improperly, leading to contamination and spoilage. They are particularly drawn to products that contain flour or similar dry goods, making them a common pest in kitchens, bakeries, and food storage facilities. Understanding their feeding habits is crucial for pest control strategies, as it allows for targeted interventions to prevent and manage infestations effectively.

The other options describe environments or materials that do not attract red flour beetles, as they do not provide the nutrients or conditions favorable for their development.