The hormone signal will be transduced through the cytoplasm of the target cell.
A community interaction would be correct!
A community is when multiple populations interact with each other, in this case the dolphins and fish.
They are called this because it's our senses. Sensory Nerves take in and communicate information about heat, cold, pressure, pain, position, and much more. They also take in information for either the outside world, or from within the body itself.