There could be a lot of reasons. To help break down food for the plants, kill off bad and harmful things that might damage the plant.
Carlos Linnaeus is considered as the "Father of morden Txonomy."
I believe the answer is C). My reason for this is because multipotency stands for multidifferentiative potential. And this is the ability to generate progeny of quite a few distinct cell types. And adult stem cells have that ability. Hope this helps.
Lasting genetic similarities make the two bears biological sister species, more closely related to one another than to any others. ... But Ursus maritimus has also evolved to match its polar environment, growing a longer snout than brown bears' and larger, paddle-like paws, both of which aid polar bears in hunting seals.