Mammals have well-developed organs of sight, hearing and smell. An auricle appeared in the organ of hearing, concentrating sound vibrations and directing them along the external auditory canal to the eardrum. The middle ear contains three auditory ossicles (malleus, incus and stapes), which transmit sound vibrations from the eardrum, greatly amplifying them, into the inner ear, which contains the auditory receptor. Hearing in mammals is very acute. Most mammals have a subtle sense of smell, due to which they look for food by smell, individuals of their own species, and detect an enemy or prey at a distance. The organ of vision is also well developed in mammals, especially in animals of open spaces. Not all mammals have developed color vision.
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.