Which one of the following best illustrates Piaget's concept of accommodation?
1) After Amanda solves a set of 10 addition problems carelessly and incorrectly, she is given 10 more problems to solve.
2) Betsy writes down her definition of a mollusk–something she learned word-for-word from her textbook.
3) Carol copies what her teacher writes on the chalkboard.
4) Donna revises her understanding of what clouds are like when she studies them in science.