Answer :
The Triassic period is the longest geological period and the Mesozoic era's smallest. The Cambrian period precedes the Triassic period.
What is the difference between the Cambrian and Triassic periods?
The Triassic era started 250-200 million years ago, following the greatest and most drastic widespread destruction ever.
It is recognized for the progression of Dinosaurs on land, flying pterosaurs, and swimming plesiosaurs as well as ichthyosaurs during the first Mesozoic period.
The Cambrian period is the most critical occasion of the Paleozoic era due to the presence of many animals.
During this time, the Earth's natural temperature is raised and the ice sheets started to melt at an alarming rate, causing widespread death and destruction.
Thus, the correct option is 1.
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