Final answer:
Marie uses a servo motor to control a robot by setting a desired position for the motor, which then holds that position and resists all outside forces until a new command is issued.
Step-by-step explanation:
When Marie sets a desired position for a servo motor, the correct answer is that the servo motor will hold the position until she issues the next command. Until then, the servo motor will resist all outside forces that move it. Servo motors are designed to receive a command signal that sets a desired position, and they utilize a feedback system to ensure they maintain that position until a new command is given. This is a common method used in robotics for precise control of movement.