Which layer is made of solid nickel and iron?
a.
crust
b.
mantle
c.
outer core
d.
inner core
i think it is either the inner core or the outer core.

Which sentence best describes the relationship between chlorophyll and the chloroplast? a.) chlorophyll is a chemical found in a chloroplast. b.) chloroplast is a chemical found in a chlorophyll. c.) both chlorophyll and chloroplasts are found in animals. d.) both chlorophyll and chloroplasts make carbon dioxide.