Question

 What is Sima made up of?

a) Silica and manganese.

b) Silica and magnesium.

c) Sulphur and mica.

d) Silica and mica. ​

Answer 1

an assemblage of rocks, rich in silica and magnesium, that constitutes the lower layer of the earth's crust and is found beneath the ocean floors and the sial of continents.

option B

please mark me brain mark list

Answer 2

Answer:

b) silica and magnesium

Explanation:

mark as brainliest