Step-by-step explanation:
Remember, an adverb often refers to a word that modifies or describes a verb, or an entire sentence. Note, the bolded word indicates the adverb in each sentence below:
1) Priyanka is sitting in front.
The adverb distinction here is that it answers the question of where? In other words, where is Priyanka sitting? in front.
2) Rahul is inside.
This adverb also answers the question of where? In other words, where is Rahul? inside.
3) The car was running fast.
The adverb here answers the question of manner? In other words, in what manner was the car running? fast.
4) Honey sit here.
This adverb also answers the question of where? In other words, where should "Honey" sit? here.