Answer:A slow to warm up 
Explanation: this is the child that even though they are slow to react to situations or they are not active at all times .
They have a very slow reaction to change however when they get exposed to situations that can change them they can slowly adapt and change gradually.
From this text Egbert is that child who is slow however he reacts to a gradual change and warms up to it.
 
        
             
        
        
        
Resocialization is a process in which a person is taught new norms, values, and practices that foster their transition from one social role to another. Resocialization can involve both minor and major forms of change and can be both voluntary or involuntary.