Final answer:
An arbitrary sign is a sign that has no necessary or natural connection to the thing it stands for or signifies.
Step-by-step explanation:
The correct answer is arbitrary sign. An arbitrary sign is a sign that has no necessary or natural connection to the thing it stands for or signifies. It is based on convention or agreement rather than any inherent meaning.
For example, the letters of the alphabet are arbitrary signs because they do not inherently represent the sounds they make, but are based on agreed-upon symbols.
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