Question

d. Lithosphere
4. Which layer of the earth is made up of iron and nickel?
a. Core
b. Crust
c. Mantle
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Answer 1

Answer:

outer core

Explanation:

The core is made of two layers: the outer core, which borders the mantle, and the inner core. The boundary separating these regions is called the Bullen discontinuity. The outer core, about 2,200 kilometers (1,367 miles) thick, is mostly composed of liquid iron and nickel

Answer 2

Answer:

core....is the right answer

hope it helps