He means its more then just what your genes give you its what you can overall think of
The density of the water causes pressure, which causes water to move.
Many of these options can be inherited based on the context. The only one i can see that is absolutely inherited is saying "please" and "thank you", because those are not built into a person. They are taught to a child so they can show respect when given something. The porcuipine using its quills when scared is the only instictive trait.
