The best answer is C i.e. humans might extract more water from the ground
The correct answer is descent with modification.
A graduated cylinder measures the volume of an object.
Internal response; when a person is infected by a bacteria or virus, the immune system springs into action to fight against the infections. Geotropism and phototropism are dealing with plants and they way they grow, while fight or flight is a physiological reaction by the human body in stressful situations-- so they are incorrect.
