Which method is called when a thread starts executing?start()init()run()execute()

The method that is called when a thread starts executing is the start() method.

Here's a step-by-step explanation:

1. When a thread is instantiated using the Thread class, the thread is in the new state and not yet started.

2. To start the thread, the start() method is called. This method is a part of the Thread class in Java.

3. The start() method does two things: it starts the thread and calls the run() method. The run() method contains the code that is executed in the new thread.

4. The init() method is not related to thread execution. It's typically used to initialize an applet in Java.

5. The execute() method is not a standard method in the Thread class. It might be used in specific contexts or frameworks, but it's not part of the standard process of starting a thread.

So, the correct answer is start().