Explanation:
Answer 1 =Santosh wanted to pursue climbing as a hobby and as a profession. To get trained in climbing, she got herself enrolled in the Nehru Institute of Mountaineering, Uttarakashi by saving money.
Answer 2= The author felt isolated because he was uncomfortable his new school due to his old school memories.And then the fire which broke in their house made him feel more isolated than ever.
Answer 3= Jonsy sees that sure is seeing the creeper tree and she says that when the last leaf will fall she will definitely die at this Jonsy says that it is a great sin to want to die.