The three basic food sources during isolation?

During isolation, the three basic food sources typically include non-perishable items such as canned goods, dried grains (like rice and pasta), and shelf-stable proteins (such as legumes and nut butters). These foods provide essential nutrients and can be stored for extended periods without refrigeration. Additionally, fresh produce and dairy can complement these staples if available, but the focus during isolation often remains on long-lasting options. Proper planning and storage are crucial to ensure a balanced diet during such times.