Answer: Las personas que habitan en La Patagonia habitan:
a. En valles de los ríos más importantes y en zonas montañosas húmedas.
Explanation:
The most populated cities in Patagonia are:
<em>1. Neuquen:</em> a city that has the union of two rivers: Limay and Neuquén, very important rivers and is located in a valley area by the sea.
<em>2. Comodoro Rivadavia: </em>it is a city next to the sea and a hill, but it is in a valley area.
<em>3. San Carlos de Bariloche:</em> it is the most touristic city in Patagonia, it is located in a valley and hill with spectacular waterfall of an impressive river.
Having these three cities as a reference, option "a" is the correct.