Muscle contraction happens only when the energy molecule called adenosine triphosphate (ATP) is present
For this item, I would go with letter "D. physical destruction of marine habitats". Many of the modern ways of fishing poses an irreversible destruction to marine habitats. These practices include trawling, lining methods, purse seining, etc.
The 3 domains of life would be, Archaea, Bacteria and Eukarya!