Difficulty: Easy
Correct Answer: letter
Explanation:
Given data
Concept/ApproachThree are sections/components of a letter; one is the whole document.
Step-by-Step reasoning Heading – component (sender's address/date or title). Body – main message/content of a letter. Closing – complimentary close/sign-off. Letter – the complete composition that includes those sections.
Verification/AlternativeAnalogy: wheel, engine, door vs. car—'letter' is to the others as 'car' is to its parts.
Common pitfalls
Final Answerletter
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