Explanation:
I would change its existing soil. some trees and shrubs thrive if you replace existing soil with certain minerals and fertilizers where you plant the Bush..
in my case, we have clay soil poor 4 most plants., b4 planting outside, put fertilized soil in the hole your planting 1st, then existing soil..
DNA is the ultimate control of cell's productions. So A.
That would be B. Cell Wall
Hope this helps.
the same goes for the other