His mother combed his hair and washed him and told him a bedtime story
The preposition in question is "on", and its purpose is to show you where the dog chewed. You can remove the preposition to form the sentence "The brown dog chewed the rawhide bone." You can also rearrange it to find the preposition, "on the rawhide bone, the dog chewed" in what is commonly known as the Yoda technique.
Dishearten, daunt, disparage, overawe, deject, depress. Hope this helps!
Hello and welcome. I am HarsharajSarma And I am from India
