In rainforests which kind of cultivation is practices?

Correct option is D

In rainforests, a type of cultivation known as "shifting cultivation" or "slash-and-burn agriculture" is sometimes practiced.
 This involves clearing a small area of forest by cutting and burning the vegetation, and then using the cleared land to grow crops for a few years until the soil becomes depleted of nutrients.
 Then the farmers move on to clear another area and repeat the process. This practice can be sustainable if the cleared area is left to regenerate for a sufficient period of time, but it can lead to deforestation and soil degradation if not managed properly.