These marine plants are considered to be the base of the food chain since they are the aquatic primary producers, organisms that can transform unusable energy (inorganic carbon) to food that other organisms can digest (organic carbon) through the process of photosynthesis.
(These marine plants; to be; the base of the food chain) (they; are; the aquatic primary producers) (organisms; can transform; unusable energy; to food) (food; can digest; other organisms)
These marine plants they organisms food
to be are can transform can digest
the base of the food chain
the aquatic primary producers
unusable energy to food
other organisms