Question

20% of which rainforest has been destroyed by slash and burn techniques? indo - burma rainforest amazon rainforest congo rainforest

Explanation:

The Amazon rainforest has had approximately 20% of its area destroyed due to slash - and - burn techniques (used for activities like agriculture expansion), while the Indo - Burma and Congo rainforests do not match this specific statistic related to slash - and - burn - caused destruction at this percentage.

Answer:

B. Amazon rainforest