Answer:
Step-by-step explanation:
This is mostly based on personal opinion but if it were me, I would reply:
Thank you for the critique, I am very thankful for the opportunity to learn. In the future I will be more cautious of the background and surrounding areas of my focal point, as well as taking more time to blur and sharpen the details. On the matter of the lighting, I intended for it to be mysterious, as you have mentioned, and I will be careful to make sure it is not so dark in my next piece.
This critique would guide my future by giving me jumping points work from, I now know what the low points of my work are and I have the opportunity to make them better.