Which did you include in your answer? Check all that apply. In 2003, astronomers discovered Eris.
The discovery of Eris caused astronomers to talk about the defining characteristics of a planet.
Because Pluto has not cleared its orbit, it is not considered to be a planet.
Pluto, Eris, and other objects like them are now classified as dwarf planets.

im not intirely sure but i think the anwser is d relative humidity

igneous rocks are formed by solidification of cooled magma (molten rock), with or without crystallization, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks.  

the composition depends on the source magma. there are almost a thousand types of composition found till now.  

hope this