1) Which is rigid? a) b) 2) Which is flexible? a) b) 3) Which is rigid? a) b) 4) Which is flexible? a) b) 5) Which is rigid? a) b) 6) Which is soft? a) b) 7) Which is rough? a) b) 8) Which is soft? a) b) 9) Which is rough? a) b) 10) Which is soft? a) b)

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