Here are some examples of adverbs which we saw in the reading text:
Adverbs that describe verbs
Sentences A and B contain examples of adverbs of manner. These adverbs give extra information about the verbs in each sentence. The adverb wildly describes the verb fluctuate to emphasise how the price changes. The adverb safely describes the verb keep.
Adverbs that describe adjectives
Sometimes an adverb can describe an adjective instead of a verb. This is what we see in sentence C. The adverb highly describes the adjective risky.