Which general formula represents the homologous series of hydrocarbons that includes the compound
l-heptyne?
A) CnH2n-6
B) CnH2n-2
C) CnH2n
D) CnH2n+2

Aphysical change is one that you can put in and remove like a ham sandwich. the stuff you put in there can be changem its not permanet. a chemical change is on that can't be change thats permanet. like when you make a cake and bake it. you can't get those ingredients back.

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 : ) 

Is there any options, for this