Spiders eat millions of disease-Bering mosquitoes
What prepositional being used or as an adverb pharse?
In the sentence "Spiders eat millions of disease-bearing mosquitoes," the phrase "of disease-bearing mosquitoes" is a prepositional phrase. Prepositional phrases begin with a preposition (in this case, "of") and end with a noun or noun phrase ("disease-bearing mosquitoes").
Prepositional phrases typically function as adjectives or adverbs by modifying or giving more information about a noun, pronoun, or verb. In this case, the prepositional phrase "of disease-bearing mosquitoes" modifies the noun "millions," telling us what kind of mosquitoes the spiders eat. It provides additional information about the quantity or type of mosquitoes that the spiders consume.