Answer:
Energy with herbivorous duck is Kg
Explanation:
As we know that energy retained at each trophic level is ten percent of the total energy contained with in an species at the previous trophic level
Thus, energy retained in bald eagle is % of the sea duck's energy
Thus energy with sea duck is equal to Kg
This energy of sea duck is equal to % of the energy of bivalves
Thus, energy retained in bivalves
Thus energy with bivalves Kg
Now, the energy with bivalves is % of the energy of herbivorous duck
Thus, energy retained in herbivorous duck
Thu, energy with herbivorous duck is Kg