Explanation:

- When a company markets its products online without intermediaries, it is using a Zero Level Channel. This is a direct selling approach, where products go directly from the company to the consumer.

- A One Level Channel involves one intermediary. Typically, the manufacturer sells to a retailer, who then sells to the consumer.

- The Two Level Channel includes two intermediaries, usually involving both a wholesaler and a retailer before reaching the consumer.

- A Three Level Channel goes through three intermediaries, such as an agent, wholesaler, and retailer, before the product reaches the consumer.

Since Nooper Limited is marketing online, it's skipping intermediaries; therefore, a zero-level channel is used.