Answer:
The correct answer for: On the existentialist view, to understand what a human being is it is not enough to know all the truths that natural science—including the science of psychology—could tell us. Is that humans can't be understood and explained in any of them.
Step-by-step explanation:
The existentialist point of view does not deny the explanations all the sciences and disciplines have about human beings. But it says that they are not enough to provide a total explanation and description of them. In other words that even though they describe phenomenons with objective measurements, they don't have the elements required to make a full explanation of human beings.