At the end he hears the old mans heart beat.
I think E. This is because if you look at all the vowels and try to sound all of them out, E would be the closest to them.
<span>It has been said that human evolution which cultured the human behavior involving sexual relationship might have been influenced by agriculture. 10,000 years ago humans have become independent and learned how to produce and create plantation which had altered human condition back then. </span>
