Provide one example each of an acid,a base,and a salt that are available in nature.

(N/A) Acids from nature: $(i)$ Hydrochloric acid $(HCl)$ is present in gastric juice,which is secreted by the stomach lining and is essential for digestion. $(ii)$ Citric acid is found in lemon and orange juices. $(iii)$ Tartaric acid is found in tamarind paste.
Bases from nature: $A$ common example is magnesium hydroxide $(Mg(OH)_2)$,often used as an antacid. Bases generally turn red litmus paper blue,have a bitter taste,and feel soapy to the touch.
Salts from nature: $A$ common example is sodium chloride $(NaCl)$,also known as common salt. It is an essential component of our diet and is formed by the neutralization reaction between hydrochloric acid $(HCl)$ and sodium hydroxide $(NaOH)$.