Answer:
A producer. For example in a common food chain, grass->grasshopper->mouse->snake->eagle. The grasshopper eats grass which is a producer so if there aren't anymore insects like grasshoppers, then the grass grows more.
E. coli is C.) a bacterium that normally typically resides in a warm blooded creatures intestines or in the environment and food.
Archaea have more complex RNA polymerases than bacteria
D.) It has a nuclear membrane
