Answer:
Study of evolution; evolutionary
Explanation:
This is the study that looks at the characteristics that we inherited from our ancestors .
Due to evolution our inherited traits have changed over time in order to adapt with the change in the environment or with the changing conditions of each time.
This may mean that even though our ancestors were able to tolerate such fats it was because it was necessary for their survival at that particular period and their body demanded it .
However the time and the conditions have changed for us, we are no longer living under conditions that demand that much fats in our bodies hence those traits have weakened .
Referring to Jean Piaget
Jean Piaget might explain that Cruz and Eva’s son is in either<span> the preoperational stage or the concrete stage.
In these stages, most children would already think about the potential effect of their actions and all of their actions would focus on seeking acceptance from the adults. So, it's best for Cruz and Evan to staty back and observe the development of their children without interrupting (only save him if he's in grave danger)
</span>
