Final answer:
The hills create problems for Jonas by causing intense and terrifying storms during the summer and creating loud echoes in the valley.
Step-by-step explanation:
The hills create problems for Jonas in several ways.
Firstly, during the summer, storms in the canyons and valleys are intense and terrifying. Jonas gets scared and hides in the dark due to the loud thunder and lightning.
Secondly, the hills cause echoes to bounce back and forth quickly in the valley, leading to a cacophony that can hurt the ears.