A. a heuristic they apply the appropriate knowledge before even choosing the answer from what they know before
They use the process of photosynthesis for energy and only in the upper 100 ft the sun can produce light into the bodies of water and the phytoplankton then use that light and use the process and convert it for their energy
Equal both equations to 180.
Pretty sure it's C as it's the only one that isn't demonstrating something that would result from a disaster.