Answer: The best option would be Species tend to disappear and then reappear due to the environment’s evolution.
Step-by-step explanation:
Option 1 is incorrect because organisms today are more complex than the organism that first appeared on Earth.
Option 3 is incorrect because fossils that have closely matched with a living species cannot only be found in the same geographical areas but are also found on different continents.
Option 4 is incorrect because 99.9% of species have gone extinct.