I THINK ITS C. NOT SURE. hope this helped!
The correct answer should be <span>The loss of plant species and habitats will devastate animals and hinder human progress.
He doesn't mention about displacement but it does decrease potential biological wealth. He mentions that animals and ecosystems will be devastated which will hinder us since we will not get the opportunity to examine new organisms that might hold solutions to our problems.</span><span />
"We had passed through long walls of piled skeletons, with casks and puncheons intermingling, into the inmost recesses of the catacombs."
"We are below the river's bed. The drops of moisture trickle among the bones."
These are some sentences that give us the creepy setting that makes for an eerie mood.
C <span>They modify adverbs.</span>