I guess it would be easier for us to define the disadvanatges if you tell us about the technologies you want to mention. For example, it is hard to think of technology and nature together but even advances like Artificial Intelligence (AI) that could not be further removed from the natural world are helping conservation efforts. Well, at least I tried to answer your question. More help you can get if you check the tips at Prime Writings site. Good luck with it!
C is the main theme of this story, for the reason of it providing multiple clues of text evidence throughout the passage that leads back to option C. Therefore, option C should be your answer.
