Answer:
From birth to between 4-5 years of the age.
Step-by-step explanation:
The capacity of child to learn to see and hear develops at is best from birth to between 4-5 years of the age. These are the sensory capacities required to develop to allow the child to perceive and respond to their surroundings. Being the prime time to incorporate the new sounds as beneficial ones, infancy is the critical time to introduce additional languages to infants.