In a word, they are unresponsive.
How is water the “universal solvent”? What is viscosity? How does water keep temperatures stable?
Its unique properties allow it to fill many roles throughout the biological world, from forming the matrix of our cells, to regulating the temperature of our planet.
He shows how water’s properties are interrelated for the apparent purpose of allowing complex life to exist on our planet.
The whole point of “fitness,” in an evolutionary context, is reproduction. One has higher “fitness” if one can have more offspring.