Connect with a knowledgeable community and get your questions answered on IDNLearn.com. Ask anything and receive thorough, reliable answers from our community of experienced professionals.
Answer:
All four words are the name of elements.
Hydrogen, oxygen, carbon, nitrogen, calcium, and iron are all important substances found in the body and in environments. They can be combined with each other, and with other substances to form larger compounds.
But i think the answer is nucleic acids..
Explanation:
Well, hope it helps you..
I tried to answer it..
Your welcome in advance..
(◍•ᴗ•◍)