Question

Which event occurred during the Mesozoic era?

Cyanobacteria filled the water and air with oxygen.


Early humans began to make tools, harvest plants, and make cave paintings.


Pangaea began to break apart into many continents separated by shallow seas.


Pangaea, the super continent, was formed.

Answer 1

Pangea began to break apart.

Step-by-step explanation:

Humans wouldn't exist for millions more years. Pangea existed before the Mezoic, and the Cyanobacteria doesn't make sense. (Not an expert though.