Is like a protective helmet for the brain a phrase or clause

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

Understand that amassed in paragraph 3 means

What is the most reliable method of research in lexicographery