<span>The reaction required an input of energy.</span>
Answer:I think it was The Heat waves can be dangerous, causing illnesses such as heat cramps and heat stroke, or even death. Warmer temperatures can also lead to a chain reaction of other changes around the world. That's because increasing air temperature also affects the oceans, weather patterns, snow and ice, and plants and animals
Explanation:
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The variety of all life forms on Earth.
Option 1 seems to be correct
The correct option is D. all of the above