I can’t see the image but I would guess animals such as deer or horse or elephants or any large animal have the ability to run over the rocks and turn them to smaller sediments
The answer to the question above is a cell.
The energy that the hawk has taken isn't enough for another animal to get any benefit therefore the pyramid has a limitation.
11 Systems would happen to be
- Muscular
-Endocrine
-Circulation
-Lymphatic
-Respitory
-Integumentary
-Repreductive
-Urinary
-Digestive