In the us who elects legistlature

Micah is studying child behavior in playgrounds throughout the world. he wants to see how the children react when teachers select the same child to be the first to use each piece of equipment. which approach is micah is using?

Which of the following is a problem in the health care system of the united states? a. too many doctors in rural areas b. too many doctors who are general practitioners c. fraud d. costs that are too low

The principal effector function of igm is