题目选项分析

Starfish, with anywhere from five to eight arms, have a strong regenerative ability, and if one arm is lost it is quickly replaced, with the animal sometimes overcompensating and growing an extra one or two.

Starfish, with anywhere from five to eight arms, have a strong regenerative ability, and if they lose one arm they are quickly replaced, with the animal sometimes overcompensating, growing an extra one or two.