<span>The option which is not a significant threat to the word's rainforests is D. shipping. Logging refers to cutting down the trees, which can obviously have negative consequences when it comes to forests. Agriculture also refers to deforestation in order to create fields for the crops. Grazing animals eat grass, which doesn't bode well for the forest. So, the only option that doesn't really have anything to do with rainforests is shipping.</span>
The one that makes the most sense to me, would have to be B. A would not be a benefit at all. While C doesn't necessarily makes sense as the device is only designed to capture energy from ocean waves. And D doesn't make sense to me in general.
RNA is single-stranded while DNA is double-stranded. RNA contains uracil while DNA contains thymine. RNA has the sugar ribose while DNA has the sugar deoxyribose.
