Answer: The answer is :
1-How difficult the struggle against nature can be.
Step-by-step explanation:
It is not a book of trips or adventures, it is a manual of resource management, optimism and peace.Those would be the only concepts that will help you to cope with a drift on a plate of ice for months, going hungry, thirsty, cold, not knowing what will be of you and your people and keep optimism at all times.