"According to Piaget, is at the heart of , which is a major advance for preschool children."

- Symbolic function; language

Explanation:

Piaget states that 'symbolic function' lies at the center of 'language.' Symbolic function is characterized as the ability that allows the children to use symbols to signify objects or events. In the age of 2-4(preschool kids), the children develop this ability and they are able to develop mental images representing distinct objects. This is the beginning of the use of language as they learn to use words to represent ideas or objects that are a major advancement for the preschool children and takes them towards the Intuitive thought substage.

is this supposed to be a question

d.

thist title points out that you are explaining the nature of the u.s. government. it is the most specific. a representative government consists of a government where decisions are taken according to a voting system. the most essential aspect of a representative government is found in the different structures where voting rights are granted to different groups of people. for example, voting for governor, mayor, president, local police chief etc.