Answer: Telomeres
Explanation: Telomeres are the regions where repetitive nucleotidesequences on the end of chromosome resides. The main function of telomeres is to prevent the end of chromosome from deteriorating or being collided with other neighboring chromosomes.
B for a reason he is getting inspired to be able to try to create a instrument that is made of ice for the idea he had from his friend.
It mean circulation, or sometimes referee to as compressions.