Answer
Александр
The correct sentence:
But of course this activity is not for everyone.
This paragraph talks about mountain climbing and the fact that it is an extreme sport and one must be prepared mentally and physically for it. It should be concluded that this sport is not for all people. The author would have mentioned it, because the whole paragraph hints at this. The other choices do not show the dangers of mountain climbing, although they do mention "mountains".
Choice “There is wonderful inspiration coming from the area itself” is wrong because it is irrelevant to the topic of the paragraph.