<u>Answer: </u>The correct answer is Option 1.
<u>Explanation:</u>
Rate of reaction can be increased by the following factors:
1. Concentration of the reactants: Greater the concentration of the reactants, faster is the reaction. Conversely, as the concentration of the reactants decrease, the rate of reaction also decreases.
2. Temperature: The rate of the reaction increases with increase in temperature.
3. Surface area of the reactants: For the reaction involving a solid reactant, the smaller is the particle size that is the greater is the surface area, faster will be the reaction.
From the given options, Temperature is playing the role in increasing the rate of the reaction.
Heating of vinegar will lead to the increase in the rate of the reaction because temperature is also increasing.
Hence, the correct answer is Option 1.