The most accurate statement is Inclusion and exclusion criteria are always needed in some form.
Inclusion criteria are the prospective subjects characteristics that should be taken into consideration in the study.
Exclusion criteria are set of predefined definitions commonly used to identify subjects who will not be included or those characteristics that disqualify prospective subjects for the study to be included
Depending on the person, many different things could work like meditation, talking to friends, maybe having some tea, taking a shower, going for a drive, having some comfort food, and so many other things that allow you to release endorphins and relax your brain. : D
A . Plumbing is the correct answer. Biology is a science, English is a language, Physical education is a more or less a co-curriculum subject. Plumbing is an artisan, its more involving and needs training to perfect in such an art.
1.the diaphragm. hope it helps