Answer:
make the top edge thicker
Explanation:
They got used to it or invented something that made it easier to live in that environment
Since maltreatments means <span>cruel or violent treatment of a person or animal; mistreatment. the answer is D becuase it is physical abuse</span>
Https://www.lungcancer.org/find_information/publications/163-lung_cancer_101/299-faqs