.........gold??..........its a guess
The best example that illustrates a sensitive period is
letter b, where the child tries to learn in speaking a second language because
this is considered to be a sensitive period in which is the period for a
development of new opportunities that a child could learn in which learning to
speak a second language is considered to be a sensitive period.
Sorry if I’m wrong but I believe it’s the cardiovascular and lymphatic system
Hope this helps!
