Which is required by all living things? A: energy B: mobility
C:oxygen
D:carbon dioxide

me and my friend did 2

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.

on island x the species needed to adapt because they were being subject to predators which didn't inhabit island y.