Can you explain what is meant by a thread in the context of process execution?

In the context of process execution, a thread is the smallest unit of execution that the operating system can schedule and execute. A thread is a sequence of commands that runs within a process and has its own stack and execution context, but shares memory and resources with other threads of the same process.

For example, in Python, you can create multiple threads using the threading module, which perform different tasks concurrently within a single process:

import threading

def worker():
    print('Thread is running')

thread = threading.Thread(target=worker)
thread.start()
thread.join()

Threads are useful for performing parallel tasks, especially when performing input/output operations or maintaining interface responsiveness.