When the initial neuron releasing a neurotransmitter into the synapse reabsorbs some of the neurotransmitter and thereby decreases the amount of neurotransmitter left in the synapse, the process is called

A) reuptake.
B) degradation.
C) blocking.
D) carrying.

The process being described is reuptake, in which the original neuron takes back some of the neurotransmitter it released into the synapse. Degradation refers to the breakdown of neurotransmitters by enzymes in the synapse, blocking refers to the interference with neurotransmitter function by other substances or drugs, and carrying is not a recognized term in this context.