What is this tiny bird doing in this big guy's mouth? The plover bird is picking the chunks of meat out of the crocodile's teeth. This helps the
crocodile's mouth stay healthy and be ready for its next big meal. What is
type of relationship is being described?

carbohydrates: (starches and sugars) composed of carbon, hydrogen, and oxygen.

lipids: (fats, oils, and waxes) are made of carbon and hydrogen atoms.

nucleic acids: contain hydrogen, oxygen, nitrogen, carbon, and phosphorus. they are polymers of nucleotides. a nucleotide has three parts, a 5-carbon sugar, a phosphate     (-po⬇️4) group, and a nitrogenous base.

proteins: made up of nitrogen, carbon, hydrogen, and oxygen. they are polymers of amino acids.

bacterium is not correct