Sagot :
The part that resembles the construction worker's job is " to build a wall". The phrase "to build a wall" gives us the hint that the actor of the sentence is a construction worker. The "hollow blocks" in the sentence supports the phrase "to build a wall" as the object to be used for the construction of the wall .
in translation process, the construction worker represent the function of tRNA, while the hollow blocks represent the specific amino acid.