Answer: Overlapping of the execution task
Explanation: Pipeline parallelism is the way of splitting the task into format or sequence of certain levels. Every level has the output from the previous level as display as its input and thus takes a form of downstream.This also helps in increment of the throughput in the central processing unit(CPU). Thus ,this process suggest that there is the overlapping in the execution tasks which is the main factor of the pipeline parallelism.
