Compare the density of the outercore to the density if the crust mantle and inner core

The mantle is made of things most commonly known as lava, and therefore is very soft. The inner core's heat causes it to compact, which makes it the hardest of the earth's layers. The outer core would come somewhere in between

Your answer is d. silli hope this ! : ) i left an explanation down below if you need it: a sill forms when hot magma squeezes between layers of rock to form a hardened sheet of rock. a sill is basically a tabular sheet intrusion between old layers of sedimentary rock, volcanic beds, or in the direction of foliation inherent in metamorphic rock. the word sill means a concordant intrusive sheet.