i think it's Ocean waves
The Sun!
Because when you eat you get energy and a food chain tells you which animal eats what
Depending on the food chain you look at, plankton or the sun. Phytoplankton capture the energy from sunlight through photosynthesis. The sun is the ultimate source of energy, but it is not an actual member of a food chain or web. Phytoplankton are at the beginning of the ocean food chain or web.
Sun
,ultimately, it comes from the sun.
The first link in the ocean food chain is phytoplankton. These microscopic organisms convert sunlight into energy through photosynthesis and serve as the primary producers of the ocean ecosystem. Phytoplankton are then consumed by zooplankton, which are in turn eaten by small fish, and the food chain continues from there.
A producer in the ocean food chain or food web is mainly phytoplanktons which are algae. The phytoplankton can be found in shallow waters and some are floating plants. They are the major source of energy in the food chain through the process of photosynthesis.
Krill are the foundation of the food chain in the Southern Ocean that surrounds Antarctica.
how is the energy in a food chain different form the energy of the wind?
Energy can be lost in a food chain by heat or waste.
Phytoplankton, which are microscopic floating plants, form the base of the ocean food chain. They convert sunlight into energy through photosynthesis, providing food for many marine organisms including zooplankton, small fish, and other marine animals.
If the number of phytoplankton decrease the food chain would decrease in the ocean.