What is a common use of bases?
a. as a component of vinegar
b. as a component of car batteries
c. to make foods tart
d. to reduce indigestion

d. to reduce indigestion

Acids actually break down digestion also the rest on the list are all acids.

Option (d) is the correct answer.

Explanation:

Bases are the substances whose solutions has pH value more than 7. Bases are bitter in taste.

Whereas acids are the substances whose solutions have pH value less than 7. Acids are sour in taste.

When excess of acid is formed in the human stomach then an antacid tablet which is basically a base is consumed that helps in reducing the indigestion.

Therefore, we can conclude that a common use of bases is to reduce indigestion.

a. they are both space stations

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the answer to your question is c