All organism depend each other in many ways. in the case of food habit for example plant get energy from the sun which is important for their photosynthesis. if this plant is ate by a snail the sail will be eaten by the birds like chicken. this chicken maybe eaten by some animal like cat. then the cat will be consumbed by some other animal .like this is will continue, so all the organism depend directly or indirectly other organism in their food habit
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All organisms depend on each other in one way or other. sun is the ultimate source of energy. with the help of solar energy plants prepare food,so they are named as producers. we depend on plants for we are the consumers.The way of eating or being eaten by others is food food chain plants come first.for eg.plant iseaten by insects,they are eaten by frog  they are eaten by snake they by vulture like that