The correct answer is: [A]: "sturdy" .
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Note:
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Choice: [B]: is "bravely"—which is an "adverb".
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Choice: [C]: is "sailed"—which is a "verb".
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Choice: [D]: is "across"—which is a "preposition".
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<span>4.It allows the narrator to see other people struggling with new cultures.
As seen here, It shows how tough it is to use chopsticks.</span>