Answer:
They took the Rubber tree seeds, and plant them on their country. After that, they started to produce latex with greater efficiency and productivity.
Step-by-step explanation:
Amazon was already losing the primacy of the rubber production monopoly, because the rubber planted by the English in Malaysia, Ceylon and tropical Africa during the period of increasing appreciation of the rubber on the international scene, with seeds from the Amazon itself. Consequently, with lower costs and lower final price, which made them take control of the world trade of the product, surpassing the Brazilian one.