(a) What is a tropihic level in an ecosystem? What is standing crop with reference to it ?
(b) Explain the role of the first troplhic level in an ecosystem .
(c ) How is the detritus food chain connected with the grazingfood chain in a natural ecosystem?

Explanation

(a) tropic level : organisms occupy a plce in the natureal surrounding or ina community accroding to their feeding relationshio with other organisms .Based on the source of their nutrition or gfood organisms occupu a specifice place in the food chain and this is knwo as trophic level
(b) First trophic level is formed by prducer theis is the basic unit these organisms can live without feeding on any another level.The only thing that these organisms need to sur vie is sunlight and water which they can turn into energy themselves .all other trophic level depends on thius for energy .
(c ) GFC is grazing food chain : it is depicted as below:
Grass`rarr`Deer`rarr`Lion
DFC is detritus food chain : It begin with dead organic matter .It is made up of decomposers which are hetyerotyrophic organisms like fungi bactgreria etc GFC is the major condut for energy flow .DFC may be connected with GFC at some levels : some of the organisms of DFC are prey to the GFC animlas.