Hi there!
We can run through these choices one by one.
Collecting and storing food - This is <u>false</u> because trees are not able to collect and store food, they instead get their energy from sunlight and photosynthesis.
Growing a thick bark and hibernating - This is also <u>false</u> because trees are not able to hibernate (the process of sleeping through the winter).
Growing a thick bark for protection against cold - This is <u>true</u>. Trees have many adaptations for survival, and this is one of them which does help them survive. It also helps because its able to protect against other outside factors, for example, animals.
Having a weak bark that animals can eat - This is <u>false</u> because we are looking into adaptations which help trees survive, and this is definitely not something which would help a tree survive.
Thus, your answer is c.
Hope this helps! Feel free to comment if you have additional questions about this problem.