Question

Food chains and food webs indicate the order in which organisms are eaten. What other information can food chains and food webs provide?

Answer 1

It can also show show the dry mass of living material at each stage of a food chain. Basically, how many organisms eat. For example:
1 oak tree → 1000 caterpillars → 100 shrews → 10 foxes
This is called pyramids of biomass.