Write down examples of some natural acids and natural bases. Also write use of them.

Formic acid, citric acid, Oxalic acid, washing soda, baking soda, etc. can be some examples of natural acids and natural bases. They both have domestic, industrial, and various other purposes.

Explanation:

There are lots of natural acids present in our nature. Some of them are the following:

> Formic acid

 USE: It is used in the stimulation of oil and gas wells as it is less reactive towards the metal.

> Citric acid

 USE: It is considered as the best rust remover as it doesn't harm the metal just remove the rust.

> Oxalic acid

USE: It easily remove iron and ink stains and that's why it is used as an acid rinsing material in Laundries.

There is a variety of natural base found in our nature which founds a lot of uses in day to day life. some of them are the following:

> Washing soda

USE: It is used in commercial detergent mixture to treat hard water.

> Baking soda

USE: It is the best rising agent used mostly in cooking and for domestic purposes like removing stains, etc..

lithosphere and asthenosphere

the answer is b because, investigating whether another species of moth also drinks tears might be interesting, but it would not directly explain why this species of moth does.

to explain why this species of moth drinks tears, the scientist could ask: "what nutrients that moths need are in elephant tears? "

the scientist could experiment with moth repellent or oter ways to keep the moths away, but that would not answer his original question.