Answer:
adverbs of manner
Step-by-step explanation:
An adverb of manner tries to describe the way in which an action was carried or to describe how an incident happened. The adverb of manner is usually placed after the object in the sentence or after the main verb of the sentence.
From the question given, the adverbs of manner are cheerfully and usefully. These adverbs helped to effectively describe how Nehru's time was spent.