Answer:
The placement of the object pronouns is different to other pronouns such as relative pronouns.
Step-by-step explanation:
This is because object pronouns are used to replace a noun so you don't have to keep using the same noun.
e.g Je vais le trouver.
I am going to find it.
Other pronouns such as relative pronouns are used to refer back to a noun.
e.g Bruno est un homme qui est tres courageux.
Bruno is a man who is very brave.
I hope that helped you understand it a bit better.