This is where the south and the north are divided, it is the border betweeen Pennsilvainya and Maryland
I believe the answer is <span>evolutionary perspective.
The </span><span>evolutionary perspective refers to the view that all our behavior/psychological tendencies are based on our instinct for survival.
</span>Another example evolutionary perspective would be baby who cries whenever near strangers happens as a form of defensive mechanism from threats.
Answer:
Oxygen
Explanation:
They go through a process called photosynthesis to make oxygen.
