is an ethical principle requiring that research participants be told enough to enable them to choose whether they wish to participate in a research study.

Informed consent

Explanation:

Informed consent is described as all information given to a person about the investigation in which he will participate. The informed consent details the entire process that will be carried out including the durability and how this can affect the person. The importance of having an informed consent is to avoid any kind of problem that may arise after it has been carried out, where the part that conducts the investigation is protected since it has informed the person about everything that consists and is signed accepting everything.

The document must contain the date and signature of the person so that any misunderstanding is avoided during and after the investigation. Regardless of whether the person is going to have a risk or it is not important to have it at hand since this document expresses everything that the investigation entails.

by using  production possibilities graph.  opportunity costs are key expenses in financial matters and are utilized as a part of registering money saving advantage investigation of a venture. such expenses, be that as it may, are not recorded in the record books but rather are perceived in basic leadership by processing the money costs and their subsequent benefit or misfortune.

answer; eliminate parking problems in cities, because a car took up only half as much space as a horse and buggy;