The adverbs that modify adjectives or adverbs, and to what extent are as follows:
A double layer of fur effectively covers a wolf. Adverb - effectively | covers
The underfur grows very thick in the cold months. Adverb very | thick
An outer layer fully repels snow and water. Adverb fully | repels
A wolf often lies near trees or rocks during a storm. Adverb often | lies
This location shelters it very effectively from wind. Adverb very | effectively | shelters
The wolf curls up tightly into a ball. Adverb tightly | curls up
Its tail completely covers its nose. Adverb completely | covers
During the spring, the underfur sheds quickly. Adverb quickly | sheds
That way, the wolf survives the extremely hot months. Adverb extremely | hot | months
Wolves can live happily in almost any climate. Adverb happily | live
What are adverbs?
Adverbs modify verbs, adjectives, and other adverbs, giving us more information about how, when, where, or to what extent something happens. Modifying adverbs can tell us to what extent something happens.
They intensify or weaken the meaning of an adjective. For example, "The extremely hot tea burned my tongue." Extremely intensifies "hot".