At some level it's just trying to survive because trying to survive is what helped all its ancestors to actually survive. It doesn't even need to be expressed a

At some level it's just trying to survive because trying to survive is what helped all its ancestors to actually survive. It doesn't even need to be expressed as a "want", since plants are doing the same thing without a nervous system, going through a sequence of actions programmed in DNA and expressed in a chain of extremely complex biochemical reactions.