This is a very vague question but i'd say they are modifying their emotional state
if two animals are held in captivity seperate when they finally meet they will more than likely be hostile to each other because they dont know what a friend is lets take a cat for example dont give a cat a friend and now it sees a interesting laser on the floor and chases it well thats adorable and all but you just taught your cat how to be hostile and hunt and it will do that for the rest of its life well now lets say this cat is 2 and an adult female when she comes across another female or another species of animal she will definitely attempt to fight it because its all she knows
        
             
        
        
        
competition
source: my biology teacher
        
             
        
        
        
Answer:
ab “its ur mayank” ye h kya sirf mere hon smje kisi or k sath to jara bi share nahi karungi... 
Explanation:
mere hon the and rhoge smje...
 
        
             
        
        
        
Answer:
Domains
Explanation:
All Biological organism can be classified or placed in a group.
Taxonomy is a branch of science that deals with naming and classification of biological organism based on shared characteristics.
In taxonomy, a domain is the highest order of classification or ranking ,its even higher than the kingdoms.
It is inclusive of all biological grouping.
All cellular organisms can be placed in any of the three domains namely, Bacteria, Archaea and the Eukarya.