Ernie took the following notes in science class: Which is the best title for these notes?

This is what i found on google“ the monomers combine with each other via covalent bonds to form larger molecules known as polymers. in doing so, monomers release water molecules as byproducts. this type of reaction is known as dehydration synthesis, which means “to put together while losing water. in the process, a water molecule is formed.” i hope this you

Where are the phrases

Gases enter the atmosphere and trap the sun's heat warning the earth.