What is the correct Answer?

Me with these questions if you’re it sure don’t answer

Hummingbirds drink nectar from flowers, while robins eat plant seeds. what does this reduce?

What do all macromolecules have in common with each other? oa. they all are formed from the same elements.ob. they all have major roles in cell membranesoc. they all act as catalysts in the body.od. they all have peptide bonds between carbon atoms.