What does a green light indicate at an intersection?

A green light at an intersection indicates that vehicles may proceed through the intersection. However, it is important to do so with caution and to yield to pedestrians who may be crossing. When you approach a green light, you should be aware that while you have the right of way, pedestrians have the right of way as well. This means that drivers should carefully check for any pedestrians in the crosswalk or approaching the intersection before proceeding, ensuring everyone's safety.

The other choices would not accurately describe the significance of a green light. For instance, stating that all vehicles must stop is incorrect, as that describes a red light. As for the suggestion to wait because traffic is blocked, that does not apply when there is a green light unless specifically directed by law enforcement. Lastly, while you may turn left on a green light, this does not mean it's the only action allowed; vehicles can generally proceed straight or make a right turn as well, provided it is safe to do so.