This document discusses the variety of foods that humans consume. It explains that plants and animals are the main food sources, with plants providing foods like rice, wheat and fruits from their roots, stems, leaves and fruits. Animals provide foods like milk, eggs and meat. The document also categorizes living things into autotrophs, which produce their own food, and heterotrophs like humans, which obtain food from other living things. Heterotrophs are further divided into herbivores, carnivores, omnivores and scavengers based on their food habits.