Anna's baby brother eats very often. Since he was born, he has grown several inches and gained a lot of weight. He has more skin, larger bones, and more muscle now than when he was born. This is an example of A.
food providing energy for an organism.
B.
food supporting the repair of an organism.
C.
food contributing to the growth of an organism.
D.
food being stored in an organism for future use.

pls help!

Lab reagent, hypothesis test. a reference solution used as a lab reagent is purported to have a concentration of 5 mg/dl. six samples are taken from this solution and the following concentrations are recorded: (5.32, 4.88, 5.10, 4.73, 5.15, 4.75) mg/dl. these six measurements are assumed to be an srs of all possible measurements from solution. they are also assumed to have a standard deviation of 0.2, a normal distributin, and a mean concentration equal to the true concentration of the solution. carry out a significance test to determine whether these six measurements provide reliable evidence that the true concentration of the solution is actually not 5 mg/dl.