The food chain.
Otherwise known as the Food Web, this expression covers the sequence of organisms through which energy and nutrients are transferred. Since some animals eat both meat and fruit, the relationships are not always simple.
The sequence of the Food Chain comprises 1. autotrophs (producers) which are principally plants and photosynthetic microorganisms to 2. heterotrophs (consumers) which comprise herbivores, to 3. carnivores which feed on the herbivores, to 4. decomposers which break down all four groups (including themselves) and make things ready for recycling.
Put simply, all living things depend on plants for survival.
Plants produce the materials (nutrients) which all living things need to sustain life and health. Carbohydrates, Proteins, Fats, Vitamins, Minerals, Water and Alcohol. Also fibre.
Approximately 6000 years ago (according to Bible chronology) this was recorded by Moses:
"And God said, "See, I have given you every herb that yields seed which is on the face of all the earth, and every tree whose fruit yields seed; to you it shall be for food.
"Also, to every beast of the earth, to every bird of the air, and to everything that creeps on the earth, in which there is life, I have given every green herb for food" and it was so." Genesis 1:29,30.
Long before scientists discovered how the Food Chain worked, the Bible had already recorded how all life depends primarily on plants for survival.
Incidentally, this is just one of many incidents where the Bible has shown itself to be absolutely accurate whenever it makes what we might call 'scientific' statements. Although the Bible is obviously not a science text book, nevertheless, whenever it makes a statement about the real world, it is always correct.
Also, it is interesting to notice that the Genesis account gives the origin of all plants.