Answer:
The suitable words for given fill in the blanks will be -
3 to 4 years
memory structures
language development
understand the world well.
Explanation:
Unlike amnesia in adults, infantile amnesia is not a disorder but a normal condition: It is one’s inability to recall events that occurred before the age of about 3 to 4 years. Some researchers explain this phenomenon as a consequence of the toddler brain’s immature memory structures, while others see a connection to the pace of language development. A third camp holds that young children do not yet understand the world well enough to encode sensory information effectively.