Final answer:
A paste of baking soda and water should be used on an insect sting to remove the stinger, reduce swelling and redness, and neutralize the toxin in the venom.
Step-by-step explanation:
A paste of baking soda and water should be used on an insect sting for multiple reasons. First, the paste makes it easier to remove the stinger, if it is still present. Second, the paste helps to reduce swelling and redness, providing relief for the affected area. Third, the baking soda paste can help neutralize the toxin in the insect's venom, alleviating the symptoms of the sting.
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