So, the mural only has some species- but we don't know which one, living in harmony. We don't know whether it's humans and we have no reason to think that it might be humans.
So it can't be A) or D) - those are connected with human activities.
it's informative to the public about this species so the correct answer is
B. 'Educating the public about the natural environment'
In social science lens, we usually think about the cause of air pollution.
The steps which government is taking to ensure good air quality. The rising air pollution and its effects on the population. ... On the other hand, social science has its own doubts and disbeliefs like who is responsible for air pollution.