Jack is a person with autism. He has severe intellectual disabilities but he can play many classical piano compositions by ear. Jack probably has a condition known as .

savant syndrome

Explanation:

Based on the information provided within the question it can be said that in this scenario Jack probably has a condition known as savant syndrome. This is a condition in which the individual with a significant mental disability is able to perform certain abilities at a far higher level than the average individual, usually in regards to memory. Such as is the case with Jack.

my hamster died and my second hamster i got after that one died as well. i also lost two birds named rainbow and kiwi, (they didn't die, they flew off and escaped). i lost a cat named omi, and a dog named snoopie. the best way i got over it is, paying my respects, and just thinking that they were in a happy place. as well as just remembering but not thinking about it all the time, just do fun activities and try not to think about it too much. hope you feel better. i'm sorry about your loss. : (