Answer:
When Bolt was younger, he trained against other great runners, comparing his training program and performance to theirs.
Step-by-step explanation:
Benchmarking consists in comparing a company's business practices with those of a top performing in the sector.
For example, a social media start up would could engange in benchmarking by comparing its practices to those of industry giants, in order to find out what it can do better according to what the giants do.
In the answer above we have an example of benchmarking, in the field of athletics. Young Bolt compared his running practice to those who were better than him, and he adapted his style in order to be more like them. This is a classical example of benchmarking.