B) Situational Characteristics
Answer:
Life began on Earth at least 3.5 to 4 billion years ago, and it has been evolving ever since. At first, all living things on Earth were simple, single-celled organisms. Much later, the first multicellular organisms evolved, and after that, Earth's biodiversity greatly increased.
Explanation:
Oxygen forms 21% of earth’s atmosphere
B. sedimentary ...hope this helps
