Include grand parents.
Nuclear family is a family group with 2 parents and their children. This is a type of family structure.  It typically centered on married couple. This is in contrast to other family group such as single parent, extended types. Extended family extends beyond the nuclear family usually extended by grand parents. Usually they live under one roof. Certain family structure has advantages and disadvantages. This is also affected by the culture and way of living of the family. 
        
                    
             
        
        
        
Dorsal means back as in the back area. Example~  Many dolphins have a pronounced beak and all have a central dorsal fin and sharp teeth for feeding, mainly on squid and fish.
        
                    
             
        
        
        
Answer:
The planet A is inner planet and B is the outer planet.
Explanation:
Because A shows 16 hr. per day revolution. and B shows maximum hours. hence A is inner and Bis outer planet.