What is south Asian wood is especially valued for its sweet scent?

South Asian wood that is especially valued for its sweet scent is agarwood, also known as oud or aloeswood. It is derived from the Aquilaria tree, which produces a fragrant resin when affected by a specific type of fungal infection. Agarwood is highly sought after in perfumery, traditional medicine, and incense, making it one of the most expensive woods in the world. Its rich aroma and cultural significance contribute to its value in various regions, particularly in South Asia and the Middle East.