rRNA is a type of RNA that combines with proteins to form ribosomes, the structures where protein synthesis occurs.
This is like the delivery truck that brings parts (amino acids) to the assembly line (ribosome).
This is like blueprints for building a specific model of a car. It carries information from DNA about how to construct a particular protein.
The cellular machinery that uses mRNA instructions to assemble amino acids into proteins. Like an assembly line in our analogy.