Answer:
D. to support her walk
Step-by-step explanation:
In the underlined word in the statement or sentence, the best definition of the word is actually to support her walk. The walking stick is an object used mostly by old people to support their walking towards a place as a result of their old age. In the case of Asia, due to the difficult terrain of the Ural Mountains, she has no option than to use the walking stick to support herself from falling off or slipping to injury.