what are features of food chain?

The food chain tells what creatures eat other creatures.

I searched Google under the key words "food chain" to get these possible sources:

http://www.vtaide.com/png/foodchains.htm
http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/F/FoodChains.html
http://www.kidport.com/RefLib/Science/FoodChain/FoodChain.htm
http://en.wikipedia.org/wiki/Food_chain
http://www.arcytech.org/java/population/facts_foodchain.html

I hope this helps. Thanks for asking.

thanks