Water was the only type of life on the planet for hundreds of million of years
Answer:
Biotic and Abiotic factors
Explanation:
Biotic factors such as predators can limit the population size.
Abiotic factors such as drought,torrential rainfalls,climate change,dessication etc.
I think that 3 is C and 2 is B
Fossil fuel was non existent 2.5 billion years ago
