OK so when I did this the answer was a and I got it right
Answer:
sorry I really don't know the answer
<span>In 1911 the Qing dynasty collapsed which brought an end more than 2000 years of imperial Chinese history. </span>
During the early earth, when photosynthesis has not yet evolved, there were only negligible amounts of free oxygen in the atmosphere. It was said that the Earth's atmosphere had no free oxygen then. This is about 3.5 billion years ago.
The tropics get more rainfall than on the other places on earth because more evaporation takes place in the tropics.
