Six-year-old fiona has no memory of a trip she took to the hospital when she was 2 years old, yet the rest of her family recalls what happened in vivid detail. her inability to remember this event is known as amnesia.

Childhood amnesia

Explanation:

Childhood amnesia is the inability to retrieve memories of episodes or events of early life. Childhood amnesia includes the gap between the two and four years.

Some psychologists suggest that this inability has to do with the fact that the conception of one's cognitive self is still not developed before this age.

In the example, Fiona cannot remember something that happened when she was 2 years old, which is totally expected to happen and is known as childhood amnesia.  

answer; biological;