The statement that is not an advantage of the Triple Entente in World War I is "superiority of numbers."
Although the Triple Entente (consisting of Britain, France, and Russia) did have significant advantages in the war, including command of the seas, internal lines of communication, and superior financial resources, they did not necessarily have a numerical advantage over the Central Powers (consisting of Germany, Austria-Hungary, and the Ottoman Empire). In fact, the Central Powers had more troops than the Triple Entente at the beginning of the war. However, the Triple Entente was able to mobilize its resources more effectively and ultimately emerged victorious.