1. Birds appear.
2. Mammals appear.
3. Sea reptiles become extinct.
Which of these best orders the events from the earliest to the most recent?
01, 3, 2
O1, 2, 3
O2, 1, 3
O2, 3, 1
The correct order from the earliest to the most recent events would be: O3, 1, 2
Explanation: Sea reptiles becoming extinct would have occurred first in this sequence, followed by the appearance of birds, and then the appearance of mammals. This order makes sense in the context of the evolutionary timeline, where certain species go extinct, followed by the emergence of new species.
