Answer:
This is an example of a Simile.
Step-by-step explanation:
A simile uses like or as
A simile is using language in a way that is similar to another thing, but they have to be alike, or same as.
in this passage, it says " You should not act LIKE a timid calf at your age.
Also with simile's, you should be able to substitute
it with the other option so let's see if we can do that
You should not act AS a timid calf at your age.
So now we see that they sound correct and almost the same, so this states that it is a simile.