Answer:
Researchers at the Occidental Research Bureau have struggled for three decades to produce an artificial leaf able to absorb CO₂ from the atmosphere and convert it into chemical energy. Yet now it seems that they have at long last achieved their goal.
Explanation:
The correct auxiliary in that sentence is have since it is referring to the researchers. In other words, it is a third person in the plural, so the correct auxiliary is have.
The term man-made is not wrong, but it would be better to use the word artificial, which means that nature did not create it.
definition of the denouement
Answer:denouement
NOUN
the final part of a play, movie, or narrative in which the strands of the plot are drawn together and matters are explained or resolved.
synonyms:
finale · final scene · final act · last act · epilogue · coda · end · ending · finish · close · culmination · climax · conclusion · resolution · solution · clarification · unraveling · windup
the climax of a chain of events, usually when something is decided or made clear.
"I waited by the eighteenth green to see the denouement"
Answer:
the final part of a play, movie, or narrative in which the strands of the plot are drawn together and matters are explained or resolved.
Explanation: