The feature that separates hominids from other primates is Complex social skills
The Tharsis bulge is probably a plume of molten mantle material that rose to Mars' surface and formed the said bulge, a rounded projection. It is also the biggest bulge with solid surfaces among all the planets known.
The process of fossilization typically begins when an organism or traces of it dies.
Hope that helps :)
I think Organelles is your answer(: