Answer:
The answer to the question is
<h2>
A. Air, Soil, Sand, Water</h2>
Explanation:
Hydrogen bonds
Guanine-cytosine and adenine-thymine <em>hydrogen bonds</em> hold the strands of a DNA helix together.
What is this subject it’s sorta hard to understand the question
In a composition reaction, two or more reactants -- often but not always elements -- combine to form a more complex compound.
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