Free points for kobe and gigi

Which of the following is an example of negative reinforcement? a. marty knocks over his mother's prize fern so she gives him a time out. b. gwen mows the lawn and her dad takes her out for ice cream. c. tara takes an aspirin, and her headache begins to go away. d. peter comes in late from his lunch and is fired from his job.

What are the main functions of the human skeleton? a exchange of gases b support and movement c sensing the environment d digestion and excretion

William poole believes economics should be taught in schools because students will learn