Answer:
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Step-by-step explanation:
The word that means "who's against doing something within a particular culture" is "nonconformist". Nonconformists are individuals who do not conform to established customs, traditions, or social norms of their culture. They may challenge or resist these norms, and may even adopt alternative or unconventional practices that are at odds with the mainstream culture. In the given example, a nonconformist might be someone who disagrees with the traditional practice of using only the right hand for eating and giving things to others, and instead chooses to use their left hand.