Hello,
Here is your answer:
The proper answer to this question is option A "The basic structure is the carbon atom".
Your answer is A.
If you need anymore help feels ree to ask me!
Hope this helps!
Adenine can't go with it because adenine can only go with thymine so it prevents it so it can go the right way
HURRICANE is the answer! Have a good day! Hope this helped!
In ecology<span>, a </span>niche<span> (</span>CanE<span>, </span><span><span>UK:</span> <span>/<span>ˈniːʃ</span>/</span></span><span> or </span><span><span>US:</span> <span>/<span>ˈnɪtʃ</span>/</span></span>)[1] is the fit of a species living under specific environmental conditions.
<span>https://en.wikipedia.org/wiki/Ecological_niche</span>