Here are corrections and improvements for the provided sentences:
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They are quite common in most forms of art. (Correct as is)
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Objects can appear to come out of the film toward audiences. (Corrected "coming" to "come")
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Art in 2D is limited to one surface. (Correct as is)
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Cultures used whatever materials could be found in their regions. (Changed "region" to "regions" for grammatical consistency)
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They were close to an elephant habitat. (Corrected "where" to "were")
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Visual and performing arts are an important part of human society. (Corrected "importaint" to "important")
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Masks were part of spiritual practices, which are unique to each culture. (Modified to "each culture" for clarity and grammatical correctness)
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Art has always played an important role in society. (Correct as is)
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Those that relate to spiritual beliefs. (Correct as is, but consider adding more context for clarity)
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No, she will need to acquire some 3D skills as well. (Correct as is)
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Many materials used to make art dissolve over time. (Correct as is)
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With print advertising or labels. (Correct as is, but consider adding more context for clarity)
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Yes, many of the concepts taught in traditional arts apply to digital arts. (Correct as is)
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Technological advancements and improvements in animation. (Correct as is, but consider completing the sentence for more context)
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They both reveal information about the cultures that created them. (Correct as is)
Overall, the sentences needed minor grammatical corrections and clarifications for improved clarity and coherence.