Answer :
Final answer:
In the context of greetings, 'Hola' is more formal, while 'Chao' is informal due to the level of familiarity and casualness they convey.
Explanation:
Hola and Chao are examples of greetings. In this context, Hola is a saludo, while Chao is not. The change in tone from formal to informal is based on the familiarity and casualness conveyed by the greetings.
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