Identify the elemental makeup of proteins.
carbon, hydrogen, and oxygen
carbon, hydrogen, and oxygen in a 1: 2: 1 ratio
carbon, hydrogen, oxygen, and nitrogen
carbon, hydrogen, oxygen, nitrogen, and phosphorus

Carbon, Hydrogen, Oxygen, Nitrogen, and Phosphorus

Explanation:

Proteins are mainly made up of amino acids. The basic structure of amino acids is that they have a carboxylic group, amino group and side chain. The carboxylic group is mainly Carbon, Hydrogen and Oxygen. The amino group is mainly Nitrogen and Hydrogen. The side chains are unique per amino acid having different elements including Phosphorus.

rising temperatures because when water vapor in the air is cooled, it condenses. it turns back into a liquid and attaches to dust particles in the air. these very small water droplets group together to form clouds