Which of the following terms describes the experience of growing back a missing part such as a tail in certain species?

The term that accurately describes the process of an organism regrowing a missing part, like a tail, is regeneration. This biological phenomenon is observed in several species, particularly in certain reptiles, amphibians, and some invertebrates. During regeneration, the organism can replace lost or damaged tissues and even entire organs through specific cellular processes that allow for the reformation of structures.

Regeneration involves complex biological mechanisms, including cell division and differentiation, where stem cells can develop into different types of tissue. The ability to regenerate is significant in nature and can serve various survival purposes, such as escaping predators or recovering from injury, making it an essential aspect of the biology of these species.

In the context of the other terms, rejuvenation typically refers to making something fresh or new again, often in a non-biological context. Reformation usually pertains to significant change or improvement in form or structure, not specifically related to biological regrowth. Resilience refers to the ability to recover from difficulties or adapt to challenges, which, while important, does not specifically denote the biological process of regrowing lost parts.