Question

the green revolution occurred during the 1950s-1970s. what was a hallmark of this revolution?
increased crop yields
decreased crop yields

Explanation:

The Green Revolution was characterized by the adoption of new agricultural technologies (like high - yielding crop varieties, improved irrigation, and use of fertilizers/pesticides) which led to a significant increase in crop production. So the hallmark was increased crop yields.

Answer:

Increased crop yields