17. another name for businesses in the trade-only industry is a. contractors. c. retailers.

Well, another name for businesses in the trade-only industry can't be contractors or retailers because contractors are people who enter into a contract or has a contract to perform certain tasks and retail is the sale of products or goods in small quantities to people for their own use. I think another name for businesses in the trade-only industry is suppliers. Hope this helped!

What does that mean

What i think is that it adds loudness for preachers/church choirs. it is also able to hold up a lot of weight without pillars. : )) idek tho