Why do people need to buy and sell products or services? people need to provide the market with goods and services. people need to buy and sell products to make a profit. we need to maintain a competitive society. in today's world, no one is completely self-sufficient?

People need to buy and sell products and services because no one is self sufficient. This eventually led to business growth in the market that in turn make and give several opportunities to the people. There will be production of the goods based on the demands of the people which also decides the price of the product.