Which adaptation makes bipedalism possible? opposable digits large brain foramen magnum in back of skull pelvis rotated inward

The right option is; pelvis rotated inward

Bipedalism is a type of terrestrial locomotion in which an organism moves by using its two legs or feet. Running, standing, walking, or jumping are the types of bipedal movement . Organisms that use this type of locomotion include humans, chimpanzees, pangolins, spider monkeys, kangaroo rats and mice, and capuchins. The inward rotation of the pelvis makes bipedalism possible.

not too sure but maybe in the hot springs.

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