Billy's mother has sent him to the store to buy eggs, bread, and milk. to remember these items, billy repeats their names. he is using to remember the items.

Billy is using the memory rehearsal or rehearsal technique by which an individual engages of having to repeat words, thought, or memories in order to get the information or for the information to be remembered and stored in one’s memory.

answer; i believe its called ; checks   and balances;

omg stop xd you need to chi