Answer to question 7: (b) Waist. Use trekking poles for stability or form a tripod with two other hikers and cross together; be extra cautious if the current is very strong or the footing very slippery.
8.When crossing a fast-moving stream, you should...
a)Angle downstream, so you’re not fighting the current
b)Unbuckle your pack, so it won’t drag you down if you fall