PLEASE HELP Which two elements are mainly found in the inner and outer core? A. Fe and Ni
B. Fe and Si
C. Ni and Si
D. Ni and C

PLEASE TELL ME WHAT THOSE ABREVIATIONS MEAN ALSO

Explanation:

Like organs in an organism, each organelle has a specific function in a cell. All of the organelles work together to carry out the functions of the cell as a whole, just as organs do to an organism. For example, mitochondria are the sites of cellular respiration; they provide energy the cell