The correct answer is biological.
Biology deals with the inner workings of our body - so, if something is the result of hormones and other physiological processes, then it will definitely be related to biology. The other options have more to do with the environment, rather than with the body itself.
Answer:
Embrace change
Smile more often even if you don't feel like it
Face and accept your suffering
Share your suffering
Help others
(sorry if this isn't helpful)