positive – adj. showing the presence of a particular germ, condition, or substance

circumstance(s) – n. a condition or fact that affects a situation

vary – v. to be different or to become different

benefit(s) – n. something extra such as vacation time or health insurance that is given by an employer to workers in addition to their regular pay

access – n. a way of getting near, at, or to something or someone

vulnerable – adj. easily hurt or harmed physically, mentally, or emotionally

plant(s) – n. a building or factory where something is made

turnover – n. the rate at which people leave a place or company and are replaced by others

exploit – v. to use someone or something in a way that helps you unfairly

comfortable – adj. not worried or troubled