Concept:E-commerce means commercial transactions carried out electronically over the internet.
Explanation:It involves the buying and selling of goods and services through online platforms.
These transactions are conducted using websites, apps, or other internet-based systems.
Among the given options, only trading through the internet correctly describes e-commerce.
Postal, telegram, and fax services are not internet-based e-commerce methods.
Answer:B. trading in products through the internet