Answer:
Consumers must obtain their nutrients and energy by eating other organisms. Decomposers break down animal remains and wastes to get energy.
secondary consumer obtain their energy by eating or consuming primary consumers.
Since an animal only becomes more complex, and not simpler, an ancestor to all organisms would have to be the most simple and primitive organism.
<span>This is in how you look at it. as a food source, fish are producers since we as humans eat fish, but they are also consumers since others eat other fish as food. </span>
