Question

Why we say energy flow in the biosphere is unidirectional ? Construct an aquatic food chain showing your trophic level

Answer 1

the flow of energy is always unidirectional ,because this is the rule of ecosystem.
For example:goat can only eat grass and grass cannot eat goat .
another,
and lion can eat goat but goat cannot eat lion .
So, energy flow in biosphere is always unidirectional .
Food Chain:-
Grass--->goat--->lion