The ability of native speakers of a language to use words in ways that are socially and culturally appropriate is called

Communicative competence

Explanation:

Communicative competence involves communicating a language by including cultural context. In other words communicating with the right use of words, grammar, phonology and taking into consideration the social knowledge.

It is how a native speaker normally speaks, but for someone who speaks another language it is difficult to be competent.

Hence, the statement here refers to communicative competence.

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.