The core of the earth is mostly composed of
a. magnesium and silicon
b. aluminum and silicon
c. nickel and iron
d. aluminum and iron

C NICKLE AND IRON HOPE THIS HELPS

Earthquakes and tsunamis

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.