So im a leap year and TODAY MY BDAYYY

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.

Why does the blending of many different diciplines present both challenges and opportunities to enviromental scientist?

During the industrial revolution in europe, were recruited to locate criminals. sheriffs police bobbies thief catchers