Final answer:
Tardigrades are essential to recolonizing habitats following destruction or mass extinction due to their ability to survive extreme conditions such as desiccation and radiation.
Step-by-step explanation:
Tardigrades are essential to recolonizing habitats following destruction or mass extinction because they are able to survive extreme conditions such as desiccation and radiation. This ability allows them to withstand the harsh environments that may result from destruction or mass extinction events. Tardigrades can enter a state called cryptobiosis, during which they suspend their metabolic activity and survive the loss of up to 99% of their water content. Their unique proteins protect their internal cell structure and DNA from damage.