Would you expect there to be more energy at the level of the krill or at the level of the puffin? Explain.

It is expected at the level of the krill there is more energy.

Explanation:

In ecosystems, when one organism eats others, only a small fraction (around 10%) of energy is transferred. This implies at a higher trophic level, the energy transferred would be lower. In the case of puffins and krill, it is expected the krill feeds on organisms such as phytoplankton (algae), then organisms such as small fishes including herrings eat the krill, and bigger organisms such as puffins (birds) eat the fish.  In this context, it is expected at the level of the krill there is more energy because this is the second level, and energy has been transferred only twice.