You have learnt that the business activities are classified into: 1) industry, and 2) commerce.
You also learnt that the industrial activities are concerned with the production of want satisfying goods and services. Unless these goods and services are made available to those who need them, they may not fulfil their objectives i.e,, satisfying human wants. Therefore, the goods produced by the industries should be made available to the consumers at right place, right time, right quantity, right price and in right manner. Here comes the activity of commerce to fulfil all these requirements. All the activities which establish link between the producers of goods and consumers of these goods, and maintain a smooth and uninterrupted flow of goods between them come under commerce.