Letters; basic units of writing.

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Letters; basic units of writing.

The key idea is that written language uses graphemes to represent sounds. A grapheme is the smallest unit of writing that carries a sound value, and it can be a single letter or a combination of letters that stands for one phoneme. For example, the /f/ sound can be written with f or with ph in different words, showing how graphemes can vary yet still map to the same sound. A phoneme is the sound itself, not its written form; a morpheme is a unit of meaning; and an allograph is a different written form of the same sound (like uppercase vs lowercase or different spellings that represent the same phoneme). Since the prompt asks for the basic unit of writing, grapheme is the best fit.

The key idea is that written language uses graphemes to represent sounds. A grapheme is the smallest unit of writing that carries a sound value, and it can be a single letter or a combination of letters that stands for one phoneme. For example, the /f/ sound can be written with f or with ph in different words, showing how graphemes can vary yet still map to the same sound. A phoneme is the sound itself, not its written form; a morpheme is a unit of meaning; and an allograph is a different written form of the same sound (like uppercase vs lowercase or different spellings that represent the same phoneme). Since the prompt asks for the basic unit of writing, grapheme is the best fit.

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