The Answer would be C. Without plants in the ecosystem, it could not feed. Plants are mainly the only producers that feed 3rd level consumers which feed 2nd level consumers which feed 1st level consumers.
Answer:
Extended Structure: Sodium chloride or diamonds.
The Same: Protons
Repeating: Atoms or series of atoms
The answer is 1, energy can not be created or destroyed but it could change from one type to another!