I would go with barb, think of a barbed wire fence and then think of the tip of the arrow. It makes the best match.
"A Sound of Thunder" Hope this helps you. (:
Answer:
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Explanation:
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The correct answer here is the option A
The formal discussion is very correct and serious, rather than relaxed and friendly, and it is used especially in official situations.
Topics that are best suited for formal discussion are:
scientific discovery, literary analysis and medical diagnosis.
literally just took this hun !