Which Feature,if Added,would Most Change a Hydrothermal Vent Ecosystem

Question

Which feature,if added,would most change a hydrothermal vent ecosystem?
A) archaea
B) tube worms
C) sunlight
D) very low pH
E) temperatures of 100°C

Accepted Answer

Hydrothermal vent ecosystems are found at the bottom of the ocean where there is no sunlight. Adding sunlight to this ecosystem would drastically change it as photosynthesis would become possible and provide a new source of energy for organisms in the ecosystem. This would alter the food web and the survival of different species.