Final answer:
The Late Triassic world was hot and dry due to massive volcanic activity and increased carbon dioxide levels.
Step-by-step explanation:
The Late Triassic world was hot and dry.
At the end of the Triassic period, there was massive volcanism associated with the opening of the Atlantic Ocean, which led to a rise in temperature. Additionally, there was a four-fold increase in carbon dioxide, contributing to a hot and dry climate. Marine animal species declined, while plant species thrived in this environment.