Question

7 which of the following statements about the earths inner core is true?
a its mostly made of iron
b its mostly made of nickel
c its mostly made of cadmium
d its mostly made of magnesium

Explanation:

Earth's inner core is primarily composed of iron, with a smaller portion of nickel and trace elements. Nickel is a minor component, while cadmium and magnesium are not major constituents of the inner core.

Answer:

A. It's mostly made of iron