Q. The Cretaceous Period is known for which one of the following events?

[A] The rise of mammals as the dominant terrestrial animals

[B] The extinction of dinosaurs at the end of the period

[C] The formation of the supercontinent Pangaea

[D] The first appearance of early humans

Answer: B
Notes:

Explanation – The Cretaceous Period (145–66 million years ago) is most famously known for ending with the Cretaceous-Paleogene (K-Pg) extinction event, which caused the extinction of nearly 75% of all species on Earth, including all non-avian dinosaurs. This mass extinction was primarily triggered by a massive asteroid impact near the Yucatán Peninsula in Mexico, creating the Chicxulub crater. The event led to global climate disruptions, blocking sunlight, and collapsing ecosystems.

Source: The Hindu

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