Use reasoning to lead to the answer of the following question:
Part of child development is when he/she stops imitating and following and begins to do what on their own?\nOptions:\n- grow up\n- form opinions\n- become adult\n- set table\n- gather flowers
 Reasoning process:
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Opinions can be formed by choice. Forming opinions is a part of child development. Forming opinions is a behaviour. Therefore, the final answer is form opinions.
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