627-3.A-4E AID: 2675 | 21/12/2012
RID: 2498 | 28/12/2012
Food chain involves several processes that follows the series of eating and been eaten. Here, the energy from one organism is transferred to the other organisms in only one direction.
A food web is the network of interconnected food chains that explains the complexities of the ecological interactions. It is not unidirectional. Hence, the option (a) is incorrect.
Pyramid of number tells us about the relative number of individuals or organisms present at each trophic level. Hence, the option (c) is incorrect.
Biomass pyramid explains the amount of biomass or living tissue present at each trophic level. Hence, the option (d) is incorrect.
Hence, the correct answer is option (b) food chain.