Answer:
The two dangers are the weather conditions and the possibility of being whipped or hanged.
Step-by-step explanation:
One of the dangers or worries that Harriet Tubman and the runaways faced on their journey to Canada is the WEATHER CONDITION as they move up north to Canada was considered cold for them and may generally have a health impact on them as they journey with the foot. And little or no shelter.
The second danger or worry that Harriet Tubman and the runaways faced on their journey to Canada is "the possibility of being whipped or hanged." Because during this period, any runway slave that is caught will face massive beating, killed through hanging.