food chain:The simplest representation of energy in a community. At the base is energy stored in plants, which are eaten by small organisms, which in turn are eaten by progressively larger organisms; the food chain is an oversimplification in that most animals do not eat only one type of organism.
------------------
food web:the interconnected feeding relationships in an ecosystem. These relationships can be complex; some organisms may feed on more than one trophic level, or changes may occur depending on a species' life history stages or the availability of food.
It would be water.
Because inside the cell it contains water. Which means the volume of the cell is influenced by the certain amount of water that's in the cell.<span />
Well basically the earth turns on it,s surface
