Final Answer:
When several tasks can start at the same time, each is called a concurrent task.
Option 1) is correct.
Step-by-step explanation:
A concurrent task refers to a task that can be executed simultaneously with other tasks. In a concurrent processing environment, multiple tasks can initiate and progress concurrently, enhancing efficiency and resource utilization. This is in contrast to tasks that must wait for others to complete before starting, which is known as sequential processing. The terms "model," "baseline," and "asynchronous" do not specifically convey the idea of tasks occurring simultaneously. Asynchronous tasks, in particular, involve tasks that can start independently but may not necessarily start at the same time.
Option 1) Concurrent is correct answer.