The seller of an option is also known as the:

In options terminology, the buyer is the holder because they hold the right, but not the obligation, to buy or sell the underlying at the strike price. The seller is known as the writer because they write the option contract and take on the obligation to deliver the terms if the holder exercises. In return for accepting this obligation, the writer receives the option premium upfront. The writer’s risk profile differs significantly from the holder’s. For many option positions, the holder’s maximum loss is limited to the premium paid, while the writer can face potentially large losses depending on the option type and whether the position is covered or uncovered. This is why option writing is closely associated with obligation, margin requirements, and risk controls. The terms taker and provider are not standard examinable labels for the counterparty who sells the option. CISI-style questions frequently test the correct technical vocabulary: holder buys the right, writer sells the right and assumes the obligation.