Final answer:
Manually signaling slowing or stopping can include using turn signals, brake lights, traffic signals, and cruise control, which all ensure that vehicles or systems slow down at appropriate times.
Step-by-step explanation:
Manually signaling slowing or stopping in the context of driving is typically achieved through the use of turn signals and brake lights. For instance, in the scenario where traffic signals are installed, they would compel vehicles to slow down by signaling when it is necessary to stop, preventing drivers from speeding through intersections.
This can be analogized to biological systems, such as in cell regulation, where stop and go signals ensure that cells proceed to the next phase only when ready. Similarly, cruise control in vehicles can maintain a desired speed and will cause the car to slow down when needed. In more manual situations like fishing, the reel must be stopped with care, applying the correct amount of brake to avoid breaking the fishing line, especially if the fish is slowing down, requiring less force.