What is the structure of our galaxy? (if you could make the answer as simple as possible, that would help a lot! If not, that's okay t - thank you for the help! <3)

Conservation efforts have been effective in "increasing the number of endangered species, reducing all the negative impacts of human activity, and preserving wildlife habitats".hope my answer has you : ) 

H+ + cn– + li+ + oh– mc001-4.jpg li+ + cn– + h2o

3-isopentane; 3-methylbutane, and 1,2-methylpropane do not meet iupac rules, so they are wrong names.the only valid name onthe list is 2-methylbutane, which is the same isopentane.this is its formula:                   ch2                    |ch3 - ch - ch2 - ch3answer: 2-methylbutane