Let’s take grass and bunnies for example.
The grass is a producer and the bunny is the consumer. The bunny eats the grass that the ground produces.
I would say A) Coevolution because the two species would evolve in response to one another. Flowers and their pollinators must evolve together. For example, if the flower has a mutation that no longer attracts the bumblebees, it will not reproduce. Then the hummingbird would have to find a new food source.
Answer:
The answer is a human.
Humans are multicellular eukaryotic organisms