Answer:
The correct answer would be - frequency of the action potential.
Explanation:
The signal that is passed from the axon to another is known as an action potential. These signals travel very fast through axons. The axon terminals are the entry site of the action potential that results in the influence of the target site or neuron.
Signals transmitted by a series of action potentials that provide information that is specific for the neurons.
Thus, the correct answer is the frequency of the action potential to interpret the primary stimulus.