Janet Werker studied language acquisition. She found that babies younger than eight months could discriminate among sounds in all languages and that infants older than one year had lost this ability, which is known as .

explanation:

may i ask what challenges?

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.

answer; (d) all of the above; 100%

answer; group think;