The answer is:
a) The alligators are the unconditioned stimulus (UCS), the alligators are the stimulus in the environment that produced a behavior (fear).
b) The dock, before the conditioning is the neutral stimulus (NS) because it had no effect on Mikaya before the conditioning happened.
c) The dock after the conditioning is the conditioned stimulus (CS) because after the conditioning it is associated with the unconditioned stimulus, in this case the alligators, and now produces the same response, in this case, fear.
d) Shake with fear is the conditioned response (CR) is the response that is produced when the conditioned stimulus (the dock) is associated with the unconditioned stimulus (the alligators).
e) Heart pounding with fear is the unconditioned response (UCR), that is the response that Mikaya experimented before the conditioning, when she first saw the alligators.