I believe that the question refers to Australia and to the fact that it's been very isolated and that as a result it has developed a number of species which cannot be found anywhere else.
The series of events here would be 1) the geographical isolation of Australia (it separated from the other lands 99 million years ago) and 2) the frequent changes in climate it experienced which led to population bottlenecks (for example it was initially very warn and then it experienced a colder period)
The reference source that will be most helpful in this case is DOT Emergency Response Guidebook
<h3>What is an Emergency Response?</h3>
This refers to the help service that responds to emergencies that happen without warning and tries to save a life or prevent further damage.
Hence, we can see that in the case of an accident scene that involves an overturned truck that carries fuel and is spilled, the reference source that would best help would be the DOT Emergency Response Guidebook.
Read more about Emergency response here:
brainly.com/question/15095063
#SPJ12
Racial discrimination ...........
Friends*.....And what you mean
