Why is a complex food wed better than a simple food chain for the survival of a community?
Because in a simple food web there is no room for adapton and
change like there is for a complex food chain. For example, lets
say the world was only rabbits and foxes. now the foxes eat all the
rabbits and the rabbits become exctinct. So sow with the foxes only
source of food gone, they'll starve to death, which in turn, causes
the world to turn into an empty wasteland. But with a complex food
chain, was as is, the foxes would have mere to prey on which would
save the rabbits and the foxes. I hope i helped...