Question

mass extinction
the graph shows five major mass extinctions throughout earths history. which major extinction event is missing from this chart?
holocene (sixth) mass extinction caused by human activity
cambrian explosion
carboniferous extinction
precambrian extinction

Explanation:

The Cambrian Explosion was not a mass extinction event but a period of rapid diversification of life forms. The Carboniferous Extinction is not one of the "Big Five" major mass extinctions. The Precambrian Extinction is not a well - recognized major mass extinction event in the context of the commonly studied mass extinctions. The Holocene (Sixth) Mass Extinction is a relatively recent event (ongoing) caused by human activities such as habitat destruction, over - exploitation of species, pollution, and climate change. It is one of the major extinction events, and since the graph seems to focus on past events (with the x - axis going back millions of years and ending at the present), it is likely the missing major extinction event.

Answer:

Holocene (Sixth) Mass Extinction caused by human activity