Answer:
1. Es probable que haya mucha contaminación en las ciudades.
2. Es probable que haya muchas vacas en los campos de la región.
3. Es posible que el agua de los ríos esté contaminada.
Explanation:
In this exercise you have to form sentences using the word "probable" and "posible" with the information provided in the questions.
1. Is there a lot of pollution in the cities?
- Probably cities have a lot of pollution.
2. Are there many cows in the region?
-Probably there are many cows in the region.
3. Is it river water polluted?
-It is possible that river water is polluted.