What would happen if currency in all countries had fewer denominations

I believe the answer is: "People could not charge as many different prices for good

Denominations refers to the face value of our currency. (for example $1 , $ 10 , $ 100). As a country enter industrialisation era, even the smallest denomination matters in determining the profit of companies who mass produce a certain type of goods. Which is why possibility of many denominations is important for trades.

the telephone is the answer

the branch of biology that deals with the normal functions of living organisms and their parts.

the way in which a living organism or bodily part functions.