B
It’s kinda hard to explain but in B. D is directly linked ( shown by the line) to C unlike in the other options
I hope this was helpful
<span>The organisms in an ecosystem fills the energy role of producer, consumer, or decomposer.</span>
DNA polymerase adds deoxyribonucleotides to DNA template strand to form a new strand of DNA.
I am confident that the answer should be.....<span>A protein acts as a pump and moves calcium ions from an area of low concentration to an area of high concentration.
Hope this helps.
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