Identify the \(2\) correct answer from the \(5\) statements:
Answer variants:
Only about \(10 \%\) of the energy goes to next trophic level
Zoo is an example of an artificial ecosystem
Food web is a series of living creatures which represent eating and being eaten
Humus are complex inorganic material produced from the dead and decaying matter
Concentration of toxic chemicals is maximum in producers
Correct statement \(1\): 
Correct statement \(2\):