The gap at the connection between neurons, through which neurons chemically communicate with one another, is called

The correct answer is Synapse.

A synapse in the nervous system refers to a composition, which allows a nerve cell or a neuron to conduct a chemical or electrical signal to another neuron or to the target efferent cell.

At the synapse, the stimulation of an action potential in one neuron, that is, the presynaptic or sending neuron, generates the transmission of a signal to another neuron, that is, the postsynaptic or receiving neuron, causing the postsynaptic neuron either less or more likely to stimulate its own action potential.