The generally close connection between health and what animals want exists because wanting to obtain the right things and wanting to avoid the wrong ones are major ways in which animals keep themselves healthy.
(A)
They can take pre-emptive action so that the worst never happens. They start to want things that will be necessary for their health and survival not for now but for some time in the future.
(B)
Animals have evolved many different ways of maintaining their health and then regaining it again once it has been damaged, such as an ability to heal wounds when they are injured and an amazingly complex immune system for warding off infection.
(C)
Animals are equally good, however, at dealing with injury and disease before they even happen. They have evolved a complex set of mechanisms for anticipating and avoiding danger altogether.
* pre-emptive: 선제의 **
ward off: 막다
