Final answer:
The implied warranty of fitness for a particular purpose does not require the seller to be a merchant. It is based on the seller's knowledge of the buyer's needs and the assumption that the buyer relies on the seller's expertise.
Step-by-step explanation:
For a seller to give the implied warranty of fitness for a particular purpose, the seller need not be a merchant. This type of warranty assumes that the seller has knowledge of the buyer's particular purpose for the good and that the buyer is relying on the seller's expertise to select suitable goods. Unlike an express warranty, which is often provided in writing, an implied warranty is not necessarily documented but is assumed by virtue of the transaction especially when the seller is knowledgeable about the buyer's intended use of the item.
Sellers frequently offer warranties or service contracts as a promise to fix or replace the good, at least for a certain time period. This functions as a promise of quality and reliability from the seller to the buyer. These options can often be seen with substantial purchases such as cars, appliances, and even houses.