Answer:
The person building the bookshelf
Explanation:
The process of translation forms the proteins by translating the codons present on the mRNA to the amino acids. The process takes place in an organelle called a ribosome.
In the following question, the pieces of wood represent the amino acids and the bookshelf represents the amino acid. The role of the ribosome which joins the different amino acids via the peptide bond is taken by the person who builds the bookshelf or the protein.
Thus, the selected option is the correct answer.