What kind of figurative language is this: "Because the way you grow up is kind of like an onion or like the things inside a trunk or like my little wooden dolls that fit one inside the other."

When george started his current job, his employer told him that at the end of the first year, he would receive two vacation days. after each year worked, his number of vacation days will double up to five work weeks (25days) of payed vacation. how many vacation days will he have in 4 years