During Biology class, when the teacher was explaining the characteristics of living things

During Biology class, when the teacher was explaining the characteristics of living things. Abhay got confused after knowing, that all the characteristics of human beings are similar to other animals. He asked his teacher about any characteristic that is exclusively found only in human beings. The teacher smiled appreciated Abhay for his attentiveness and explained him about it.
(i) What is the characteristic exclusively found in humans?
(ii) What are the characteristics of living things?
(iii) Why viruses are not considered as living?
(iv) What values are shown by Abhay?

(i) Human beings have the ability to express themselves through a proper language or script, which makes them different from other living things.
(ii)The characteristics of living things are growth, reproduction metabolism, conciousness, etc.
(iii) Absence of metabolism in viruses makes them a connecting link between living and non-living.
(iv) Abhay is intelligent, inquisitive and have a scientific attitude.