"Identical" refers to two or more items that are exactly the same in every aspect, such as appearance, structure, or characteristics. This term is often used in various fields, including science, mathematics, and everyday life, to describe objects, images, or even people that cannot be distinguished from one another. In biology, the term "identical twins" describes siblings who develop from a single fertilized egg that splits into two embryos. These twins share the same genetic material, making them nearly indistinguishable in terms of physical traits. However, environmental factors can lead to differences in personality and behavior over time.