What caused earth to develop layers as it cooled?
a) differences in density
b)its magnetic field
c)escape of gases
d) its speed of rotation

a axis of a graph is a color or shade so we can all go outside and have a party so we can eat   some grilled cheese sammiches and broccoli and have some ugly fun times

i don't know why i put this, i know its not the i was just bored : p

delete this answer while you can

what is shown in the image?

eukaryote

chloroplast

mitochondrion

submitted