After the release of the function of the support, the hand went in the direction of its improvement for work and the manufacture of various tools. The use of manufactured hunting tools allowed humans, along with plant foods, to widely include in the diet and more high-calorie food of animal origin. Cooking on fire reduced the burden on the chewing apparatus and digestive system. As a result, the skeleton of the skull became lighter. With the development of labor activity, there was a further unification of people for living together. This broadened man’s ideas about the world around him. New ideas were generalized in the form of concepts, which contributed to the development of thinking and the formation of articulate speech. With the improvement of speech, the brain developed.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.