It is not. Habitable does not mean to humans but in general to life forms. It just means that <span>the range of orbits around a star within which a
planetary surface can support liquid water given sufficient atmospheric
pressure and that some form of organic life could develop, but this does mean that humans could live in them. They should definitely spend more time looking at them because the processes in those planets might be harmful to humans so humans shouldn't just try to visit them before understanding them.</span>
Positive results will come as it changes local biodiversity. Hope this helps.
Petroleum because it is compressed over time and get created into that gooey substance
//I am not sure of any of these answers, I did some research and find this most accurate.
1) D
2) A
3) A
//Hope it helps.