What are 3 subtopics for the topic endangered species?

An endangered species is a species that is on the brink of extinction.  Species can be endangered in two ways.  First, its habitat could be threatened in a way that makes extinction likely if no change is taken.  Second, the species could have experienced a significant decline in population that is likely to lead to extinction. In the United States, determination of whether a species is endangered is made by either the U.S. Fish and Wildlife Service or the National Marine Fisheries Service, but designations vary from country-to-country.  Internationally, the International Union for Conservation of Nature makes decisions about which species are considered endangered, though those decisions are not binding on individual countries and their classifications of species. Here are three subtopics for endangered species. 

1. Where endangered species live.  It should come as no surprise that there are hotspots where many species are endangered.  How many species are endangered in those areas?  Where are these places on the globe that have high concentrations of endangered species?  Why are those species endangered?  What can be done to help correct the conditions that have led to these high rates of endangered areas.  The Amazon Rainforest is being destroyed at a high rate and many of the species in it are extremely localized; is it possible for us to even know how many endangered species exist in it?
2. What conditions make species more vulnerable to becoming endangered?  Even in areas where human involvement and changing conditions have threatened some species, other species not only survive, but actually thrive.  One of the best examples of this may be the coyote in the United States.  While other predators, such as wolves, bears, and wildcats, have been chased out of their areas and may be threatened or endangered at least in their local areas, coyotes have adapted extremely well to urban and suburban environments.  Are there differences in the characteristics that lead species vulnerable to becoming endangered and species that are more adaptable?
3. What can people do to help endangered species?  The role of human behavior in species extinction is well-documented.  Therefore, concentrating on steps that humans can take to help endangered species would make a great sub-topic.  This could look at specific actions like boycotting the use of palm oil or more universal efforts, such as stopping deforestation.