Which two major parts of the Earth system does this photo most clearly
show?

cryosphere and atmosphere seems like it.

Explanation:

b is dominant over the allele for the white fur.

in a chemical reaction, the atoms and molecules produced by the reaction are called products. no new atoms are created, and no atoms are destroyed. in a chemical reaction, reactants contact each other, bonds between atoms in the reactants are broken, and atoms rearrange and form new bonds to make the products.