Final answer:
Hiking in the mountains can be dangerous if you are not well prepared for weather changes. Hikers may/might/could get hurt if they do not know what they are doing.
Step-by-step explanation:
Hiking in the mountains can be dangerous if you are not well prepared for weather changes. Hikers may/might/could get hurt if they do not know what they are doing.
In the first sentence, the modal verb 'can' is used to express possibility or ability. In the second sentence, the modal verbs 'may', 'might', and 'could' are used to express uncertainty or possibility. These modal verbs suggest that there is a chance that hikers could get hurt if they lack knowledge or experience.