Final answer:
A single process is required for each thread, but one process can host multiple threads. Threads within a process share its resources and can execute tasks in parallel, thus improving efficiency and multitasking capabilities on multicore CPUs.
Step-by-step explanation:
In the context of computer science, particularly in the concept of concurrency, a thread is a sequence of programmed instructions that can be managed independently by a scheduler, which is part of the operating system. When considering processes and threads, it is important to clarify that a process is a separate running program, which contains one or more threads. Each thread within a process shares the process's resources but is able to execute independently.
One process is required to contain each thread. However, a single process can contain multiple threads. The operating system allocates resources like memory space and access to system resources to a process, and all threads within that process share these resources. This model can be more efficient than having a process for each thread because threads within the same process can execute tasks in parallel, making better use of the available CPU cores.