Why unequal access to basic services amount to social injustices?

Why is people bullying? what's the target?

Scientists who study the anatomy of the systems in the human body focus their studies on

Does the weight loss program have practical significance? a. no, the program is not practically significant because the results are likely to occur even if the weight loss program has no effect. b. yes, the program is practically significant because the results are too unlikely to occur by chance. c. yes, the program is practically significant because the amount of lost weight is large enough to be considered practically significant. d. no, the program is not practically significant because the amount of weight lost is trivial.