Answer:
More than 20% of the amazon has been destroyed, affects biodiversity.
Explanation:
- The biggest issues that the amazon is facing is the deforestation and it involves the clearing of land areas for logging, farming, and other land-use changes. 
- Effects that are seen are droughts, floods, destruction of habitats of flora and fauna along with the valuable services of the ecosystem.
- This leads to a decrease in the carrying capacity of the species and the decline of the essential resources that are necessary to survive.
 
        
             
        
        
        
Answer:
C. It speeds up, and the angle increases
Explanation:
We can answer by using the Snell's law:

where
 are the refractive index of the first and second medium
 are the refractive index of the first and second medium
 is the angle of incidence (measured between the incident ray and the normal to the surface)
 is the angle of incidence (measured between the incident ray and the normal to the surface)
 is the angle of refraction (measured between the refracted ray and the normal to the surface)
 is the angle of refraction (measured between the refracted ray and the normal to the surface)
In this problem, light moves into a medium that has lower index of refraction, so

We can rewrite Snell's law as

and since

this means that

which implies

so, the angle increases.
Also, the speed of light in a medium is given by

where c is the speed of light and v the refractive index: we see that the speed is inversely proportional to n, therefore the lower the index of refraction, the higher the speed. So, in this problem, the light will speed up, since it moves into a medium with lower index of refraction.
 
        
             
        
        
        
The frequency of a wave increases when the energy increases