What does it mean when a question asks: what is your plan for development of your idea or stimulus?
We all have goals of different kinds, but not all of us know how to reach those goals. You need to be working with the concept of how goals and objectives are parts of the same puzzle, so to speak.
What is your goal? What do you want to accomplish? (This is the long-range outcome you want to reach.)
Now make a list of the steps you need to take to reach that goal. Those steps are often called objectives.
The objectives you write down that will lead you to reaching your goal make up your plan.