<em>Four main classes that define a macromolecules are</em><em> </em>
<em>Protein</em>
<em>carbohydrates </em>
<em>lipids</em>
<em>nucleic acid</em>
<u>EXPLANATION: </u>
Macro-molecule is a large molecule which can contain more than 100's and 1000's of atoms. They are different from the smaller molecules and each macro-molecule does more than one function.
Macro-molecules are made up of single elements of monomers joined using covalent bonds and a large polymer is formed. For example, one molecule of polyethylene which is plastic has more than 2500 methylene groups, each one of them has two hydrogen and one carbon atoms.
Climate change leads to: A warming ocean: causes thermal stress that contributes to coral bleaching and infectious disease. ideally humans also cause these things if that is an option
