Industry refers to the act of producing raw materials and finished goods
Manufacturing industry is concerned with converting raw materials into final products.
Commerce refers to the act of buying, selling and distributing of goods and services.
Trade is concerned with buying and selling of goods. It is the process of exchanging goods with money for mutual benefits of the buyer and seller.
The act of buying goods in a larger quantity and selling them in a smaller quantity to a number of retailers is called wholesale trade.
The act of buying goods from the wholesaler in a large quantity and selling them in a smaller quantity of final consumers for their personal use is called retail trade.
Foreign trade is the act of buying and selling goods outside the boundary of the country.