What features of man fundamentally distinguish him from animals?

1) The manufacture of tools (“use” is not the right answer)
2) Meaningful speech (just “speech” is not a valid answer).
3) The presence of a second alarm system.
4) Abstract thinking

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.