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.

Pangea began to break apart.

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.

correct answer is option a.

tropopause, stratopause and mesopause have all in common aspect that is point of maximum temperature in its layer of the atmosphere. all layers of atmosphere observe abrupt change in temperature. tropopause is the boundary between troposphere and stratosphere. stratopause is the boundary between stratosphere and mesosphere. mesopause is the boundary between mesosphere and thermosphere. these all boundaries are ranges between altitude of 0 to 80 km.