Final answer:
Multithreading is an execution model where multiple threads operate within the same process, each with separate stacks and control blocks, enabling efficient parallel task processing, as seen in Java.
Step-by-step explanation:
An execution for multiple threads per process, where each thread has its own user stack, kernel stack, and control block, is known as Multithreading. In multithreading, the system can follow different paths for every cycle, depending on how threads are scheduled and executed. This allows for efficient utilization of CPU resources by performing multiple tasks simultaneously within the same process. Java is a prominent example of a programming language that supports multithreading.