dwayne has been using heroin for two years. while visiting his mother, he decides to stop. when he stops using the drug, dwayne experiences shaking, irritability, and an inability to concentrate because he is going through a. withdrawal b. tolerance c. addiction d. psychological dependence

the invasive species was introduced due to commercial purpouses, as there was a demand for fur clothes and hence, a business opportunity connected to this product. actually, it was when the nutrias scaped, causing harm to the us ecosystems when they acquired the status of invasive species. in this case they have caused an environmental problem, but it could have affected also economic interests or even human health.

on the first day of new student week, amber revealed to her roommate that she is a lesbian. this is an example of self-disclosure.