Abiotic factors are the non-living factors which play important role for sustaining life on earth. These includes water, soil, air and sunlight. Water is important for all the trophic levels of the food chain. Water is the necessary ingredient of the available biomass in all the trophic levels. The large part of the body weight in all the organism consists of water. In the absence of water the organisms may not survive and they will die. If the organisms from the lower trophic levels decline in number then the dependent organisms of the higher trophic level will also decline.
Therefore, the statement Abiotic factors, like water, are critical to most food chains. is true.
