Choose the mass extinction of most interest to you. Cretaceous-Tertiary
End Triassic
Permian-Triassic
Late Devonian
Ordovician-Silurian

You'll create a graphic representation of the three stages of one of the mass extinctions, as shown in the following table. Upload your presentation in the box below.

Ithink it would be choices a and b. hope this !

The truth is that any source can be the best source for some kind of research. as an example, if you were to write an essay about the credibility of wikipedia, would you avoid citing wikipedia? clearly not. as we know, the president of the united states jumps on twitter all the time. if you’re writing about trump, what better source can there be? it is, quite literally, an original historical document. the same would be true if you were writing about the events of the moderately recent revolutions in egypt and syria. what better source than someone who is right there in the thick of things? clearly you would have to contextualize the source as at least moderately unverified in most such cases.