For enlightened beings and children, the order of preference is burial over cremation, there are exceptions though like Sri Ramakrishna Paramahamsa and Swami Vivekananda were cremated.
Some people say enlightened being and children are not attached to the body so they are buried and other beings are attached to body so they are cremated.
Even if this reason is true then also why not cremate enlightened beings and children instead of burying? Is burial better than cremation? Or any other reason is mentioned in any scripture in favor of burial over cremation?