The forward arrow in a chemical equation typically means that the reaction proceeds in the forward direction, indicating that reactants are converting to products. If you see a double-headed arrow (↔), that indicates that the reaction is reversible. Therefore, in the context you've provided, the correct interpretation of a forward arrow would be that it indicates the direction of the reaction, not that it proceeds quickly or slowly.
So, the most accurate choice from the responses you provided is: The reaction is reversible. However, this should ideally refer to a double-headed arrow. If you strictly consider the single forward arrow, it indicates movement towards products rather than reversibility.
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