Answer: Fraternal, Identical, and Semi-identical. also, Siamese (conjoined twins)
Explanation:
The answer is continuity theory. According to this theory, adults in their later stages will maintain and conserve the activities, relationships, as well as behavior, as they did in the earlier stages of their lives. Older people try to maintain their lifestyle, and their past experiences influence the strategies which they adapt to adjust to the old age.
