Please answer this question carefully.
Sub: Physical Education

Idon't see any options or anything!

Betray, destroy, and obey do not need to be changed to add the suffix -ed, because the "y" at the end of each word is preceded by a vowel  (so  they would be spelled  "betrayed," "destroyed," and "obeyed").

but hurry is different; it has to  be spelled "hurried" because the "y" at the end of "hurry" is preceded by a consonant.

The correct answer in this question  is option c. people in mountainous areas tend to be more isolated from other populations. this is the reason why their local languages do not spread. farming is their  one way of living among the highlanders.