How is the underlined gerund used in the sentence?

Smiling is an important step in a baby's development.



A.
direct object


B.
object of a preposition


C.
predicate nominative


D.
subject
(smiling should be underlined.)

Respuesta :

B. It's defined as "preposition is a word that comes before one noun to show its relationship to another word in the phrase or clause." Smiling is a verb which comes first before anything else, the noun/adjective