The initial source of energy for all food chains is the sun. A food chain always starts with a producer. A producer is an organism that makes its own food. Most food chains start with a green ...

In fact, the Sun is the ultimate source of energy for almost all ... atoms from a complex organic food molecule are fully oxidized at the end of the reaction chain, they are released as waste ...

Well, green plants convert the Sun's rays into energy through a process called photosynthesis. Almost all food chains begin with a green plant. Here in the sea, seaweed and plankton do the job.