Давай сопоставим слова с их определениями. Помни, одно определение будет лишним!
a song or melody. (песня или мелодия) — это определение не подходит ни к одному из данных слов.
Соответствия: emit - to send out or release something, like gas or light; a jar - a glass container with a wide opening; toxic fumes - dangerous gases or smoke that can be harmful to breathe; reduce - to use less of something; a carton - a container made of paperboard for packaging goods, like milk or cereal; checked - having a pattern of squares; handsome - good-looking, especially for a man or boy; discount - a lower price than usual; waste - unwanted or unusable materials that are thrown away; cashier - a person who takes money in a store. Лишнее: a song or melody.