Final answer:
In concurrent programming, a 'task' is a unit of work similar to a thread in an operating system, capable of independent and potentially concurrent execution with other tasks.
Step-by-step explanation:
Each task in a component is similar to a thread in an ordinary OS, with certain limitations. In the context of concurrent programming, a task is a unit of work that runs on a thread. Each task can execute independently and may run concurrently with other tasks, much like threads in an operating system.
However, tasks might be subject to certain constraints and scheduling policies that differentiate them from traditional OS threads. Tasks are used in various programming models and frameworks to facilitate asynchronous and parallel processing.
A component is a modular unit of a software system, and each task within a component can execute independently. Tasks within a component can share resources and communicate with each other, similar to threads in an operating system.
Therefore the correct option is D) task