Which figure of speech does henry david thoreau use in the following example: "i grew in those seasons like corn in the "? personification alliteration simile

the cost of attendance or coa is an approximate budget for the cost of attendance of the whole academic year. in order to calculate this, universities take into consideration many factors like room and board, tuitions and fees, books, transportation and personal expenses such as medicine, laundry, clothing. all these factors combined make up the final sum to the cost of attendance in each university.

the answer is a)   a sentence of death costs the state "almost three times as much as a sentence of life in prison" (delon 147)