45. Many scientists, including Charles Darwin, have wondered why we cry tears What is the biological or evolutionary purpose of tears? We could just as well cry without any tears falling, but, in fact, our eyes fill with tears. Scientists have proposed many theories about tears, but none of these theories has been proven. evolutionary terms,
a. the reason for tears remains a mystery.
b. Darwin explained the origin of tears.
c. there are many reasons for crying with tears.
d. only Darwin studied the origin of tears