Final answer:
A closed zone true refers to an area where your view is blocked or movement is restricted, and it is indeed true that a closed zone can be caused by a restriction in your line of sight or intended path of travel, mainly in the context of driving safety.
Step-by-step explanation:
The statement that a closed zone is a space not open to you because of a restriction in your line of sight or intended path of travel is A. True. A closed zone refers to an area where your view is blocked or where movement is restricted, due to various potential obstacles or hazards. This concept is often associated with safe driving, where anticipating closed zones can help prevent accidents and enhance roadway safety.