The informal language changes over time as words are borrowed and modified, generations use words in different ways and movies, sports, and music create new words. Thus, options a, c, and d are correct.
Informal language is the language that uses slang words and phrases that more spontaneous and casual. It denotes a personal tone, unlike formal language.
The words used in the informal languages changes as the people adopt words from other languages and can use them differently as per the need. The culture, movies, music, and other entertaining activities are also factors in changing words.
Therefore, the language changes over time due to generation, culture, music, etc.
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