Answer:
A. It identifies the parts of a roller skate, while the text defines the purpose of each part.
Step-by-step explanation:
Based on the excerpt, there is an explanation given about how to take proper care of a roller skate to make it last longer and be more durable.
The narrator advises on letting the skates air dry after every use, if they have leather boots, cleaning the bearings and oiling them too.
Therefore, the diagram enhances the meaning of the text by identifying the parts of a roller skate, while the text defines the purpose of each part.