At the end of the fourth paragraph ("And below the surface... scour marks"), the author strategically arranges sentences in a way that

E. Emphasizes the mounting evidence for the complexity of the ocean’s currents

Explanation:

The author begins these sentences with “And below” to claim that beneath the surface currents there are other distinct currents with different speeds, directions, and volumes. By repeating “And below” at the beginning of the next sentence, the author suggests that there are yet other currents beneath these. The author’s arrangement of these sentences therefore suggests that the layers of distinct ocean currents are potentially endless. After making this suggestion, the author then includes the fact that there is photographic evidence supporting the idea that there are currents on the sea bottom, which had once been thought to be still. By arranging the sentences in this manner, the author affirms her claim regarding the unending complexity of the ocean’s current by revealing that there is already proof to support the claim.

what do you mean

explanation:

normally working animals are domesticated and ruled by a master, a domesticator (tamer), to perform basic and important functions on a farm, for example. the value used in this context is animal labor in exchange for food. it is not so much a contrast to the story told by napoleon and the pigs, since the animals of that particular farm also performed functions on the farm through domestication. the only thing is that in this case, who rules them is a pig, also an animal, but very respected, to whom the other animals lent him submission. that's about a strong relationship of dependency between animal and owner.