(d) Oxytocin is a hormone secreted by the pituitary gland. It is also known as "cuddle hormone" or the "love hormone" because it releases when people snuggle up or bond socially. Aspartame is an artificial non-saccharide synthetic sweetener. It is 200 times sweeter than sucrose and is commonly used as a substitute for sugar in foods and beverages. Neoprene is a synthetic rubber that is produced by the polymerisation of chloroprene. Rayon is a manufactured fiber made from natural sources such as wood and agricultural products that are regenerated as cellulose fiber.