Why are you afraid of darkness?

Through evolution, humans have therefore developed a tendency to be scared of darkness. “In the dark, our visual sense vanishes, and we are unable to detect who or what is around us. We rely on our visual system to help protect us from harm,” Antony said. “Being scared of the dark is a prepared fear.”

Im not so much afraid of the darkness but what is hiding inside of it and the ability to not see the world around you.

can you explain it better

dude you should crop your image so only the question shows. but   can you explain it better