Ontario Security Guard License Practice Test

The legal age of becoming an adult in Canada varies by province. However, in most provinces, including Ontario, the age of majority is 18. This is when individuals are considered legally old enough to make decisions and bear responsibilities for themselves. It's also the age one needs to be to apply for a Security Guard License in Ontario. Hence, the correct answer is 18. Laws can vary significantly by geographical region and specific circumstance, so it's always advisable to check the specific laws that apply wherever you are.