Final answer:
A signal with a green arrow and red light at an intersection means you can safely turn in the direction of the arrow; other traffic must wait.
Step-by-step explanation:
At an intersection, a signal showing a green arrow and a red light typically means that drivers must stop if they are not turning in the direction of the arrow but may proceed with caution in the direction the arrow is pointing. In this scenario, option 4 is correct: You can safely turn in the direction of the arrow.
When faced with this traffic signal, drivers turning in the direction of the green arrow are allowed to do so, while other traffic movements, such as going straight or turning in another direction, are not permitted until the signal changes to provide a relevant indication.
A green arrow signifies the right of way for drivers to follow the direction of the arrow, which enhances traffic flow and pedestrian safety. It is an important signal indicating that other movements are stopped, thereby drastically reducing the chances of an accident at the intersection.