Which of these is thjftjftjftjta source of pollution caused by humans?

He saw, once and for all, that he stood no chance against a man with a club. he had learned the lesson, and in all his after life he never forgot it. the excerpt demonstrates that buck is learning to

Patrick bought 7.5 pounds of frozen shrimp. the shrimp is sold in 1.5 pound packages. how many packages of shrimp did patrick buy?

Asl may be used regularly in which field?