Final answer:
The Taskbar is on the far left side of the screen and allows users to select from available windows. Users can open a simulation from the Interactive Labs box by clicking the OPEN SIMULATOR button.
Step-by-step explanation:
The Taskbar is the element that displays on the far left side of the screen and displays a selection box of available windows. When content is loaded, the Taskbar provides quick access to open applications and windows. If you are ready to create a simulation, you may find the OPEN SIMULATOR button in the upper-right corner of the Interactive Labs box. By clicking this button, you can start the simulation tool and begin the interactive learning experience.