I have often observed that people tend to ignore strays and occasionally, even wounded animals. This is either due to lack of knowledge or if sensitive, lack of direction. They just do not know what to do or where to take the animals.
At least one could make an attempt to do better in such circumstances starting with their own neighbourhood. To make people aware of such sensitivity towards animals and to make a difference in the quality of life for animals, a welfare committee needs to be formed with animal lovers. The next step would be pool some funds to start functioning. The government or welfare organisation could be approached for funds or guidance.
Initially the committee could meet informally and plan out their actions. In the beginning, stray or wounded animals could be taken care of and attended to, in the nearest animal care centre available. This may work only temporarily and may not be convenient. Eventually, the committee would need to set up a place for animals to be brought in and attended to. They would need to keep the place replenished with food and medical necessities too.
A veterinary physician needs to be appointed at the centre. They would also need more volunteers once they are set up, to make an impactful difference in animal care.
After all this is achieved they could start spreading awareness campaign through advertisement, posters, street shows, training etc.
The author of the text that contains this quote appeals to the reader's sense of logic by quoting an authority/expert on the matter. Taking into consideration that expert's opinions, in argument, are as close to a fact as you can get without actually using a fact, this shows us how your best answer here is option B.
I think they saw nature in a spiritual way as the collective "Over-soul" of all the souls that create and reside in every form in creation. That means that very soul is one with and is the Over-soul, which some call God, but Dickinson and Whitman may have thought that word had to much connections to organized religion which has a different definition than they had.
