To solve this problem, we need to identify which of the given options is an example of a hormone-releasing IUD.$\newline \bullet$Option 1: CuT - This is a copper-based intrauterine device (IUD) that releases copper ions to prevent pregnancy. It is not a hormone-releasing IUD.$\newline \bullet$Option 2: LNG 20 - This is a hormone-releasing IUD that releases levonorgestrel, a type of progestin hormone, to prevent pregnancy.$\newline \bullet$Option 3: Cu 7 - Similar to CuT, this is another copper-based IUD that releases copper ions and is not hormone-releasing.$\newline \bullet$Option 4: Multiload 375 - This is also a copper-based IUD and does not release hormones.$\newline$Therefore, the correct answer is Option 2: LNG 20, which is an example of a hormone-releasing IUD.