Correct Answer is A. They were able to increase their productivity due to the popularity of tractors.
Trophic cascades are interactions with much power that control an entire ecosystem when suppressed
Answer:
Co2 and H20
Explanation:
(won't explain because ur in a rush!!!)
<span>the interference of two waves of equal frequency and opposite phase, resulting in their cancellation where the negative displacement of one always coincides with the positive displacement of the other.</span>