Final Answer:
To move the turtle forward by 200 pixels, you would use the command forward(200).
Step-by-step explanation:
In programming, especially in environments designed for teaching and visualizing code, commands are used to control objects on the screen. The question specifically mentions moving a turtle, which suggests a context related to turtle graphics commonly used in introductory programming environments.
The command forward(200) is a common syntax in turtle graphics. It instructs the turtle to move forward by a specified number of pixels, in this case, 200 pixels. The forward() function is part of the turtle graphics library and is used to control the movement of the turtle cursor on the screen.
In summary, to achieve the desired movement, the correct command would be forward(200).