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What is the primary function of the word 'yeah' in casual conversations?

• To ask a question

• To indicate agreement

• To show confusion

• To express disagreement

In which of the following contexts is 'yeah' most appropriately used?

• Legal documents

• Casual chats

• Scientific papers

• Formal presentations

Why is 'yeah' considered important in communication?

• It adds formality to the conversation

• It helps in expressing complex ideas

• It facilitates smooth and informal interactions

• It is used to start debates