Final answer:
The selection that includes only essential amino acids for a growing child is Leucine, Valine, and Threonine. These are part of the set of amino acids that the human body, particularly in the case of growing children, cannot synthesize in sufficient quantities.
Step-by-step explanation:
In the context of human nutrition, essential amino acids are those that our body cannot synthesize and thus, must be obtained through diet. These include Histidine, Isoleucine, Leucine, Lysine, Methionine, Phenylalanine, Threonine, Tryptophan, and Valine. In the case of growing children, Arginine also falls into this category as it cannot be synthesized in sufficient quantities.
Therefore, out of the given options, selection B) Leucine, Valine, Threonine consists solely of essential amino acids for a growing child.
Learn more about Essential Amino Acids