Is they singular subject or compound subject?

Explain the difference between do vs does like: do something do this does something do this

Read the extract below and identify the three kind(s) of bias that are apparent within it. despite being reintroduced in the 1600s by idle, muddle-headed aristocrats in order to be slaughtered for fun, all the wild boars that were brought to australia from the continent eventually died out. for the next 300 years there were no boars in australia, but in the 1980s farmers saw a chance to diversify and began to import and farm them. some of these beautiful, intelligent animals escaped and established herds of their own, once again living wild and purely natural lives. while their ideal home is in woodland, boars are hardy and are able to live in multiple habitats. a/ mistreatment of opposing views b/ positive stereotyping c/ subjective vocabulary d/ personal attacks e/statistics f/ corporate bias e/ negative stereotyping g/ offensive language

Read the excerpt from”do not go gentle into that good night” which statement best describes the effect of the refrains in this excerpt?