Final answer:
At the end of the Cretaceous, extensive volcanism occurred in India, with massive lava flows and the release of sulphur dioxide contributing to climate change and the mass extinction of many species.
Step-by-step explanation:
Huge volcanoes were present at the end of the Cretaceous in India. This period of extensive volcanism began around 66 million years ago, coinciding with the asteroid impact in the Yucatan peninsula. The immense lava flows from these volcanoes covered over 50 percent of what is now India, and the release of volcanic gases, especially sulphur dioxide, likely contributed to significant climate change and may have played a role in the mass extinction event that marked the end of the Cretaceous.