Identify the gerund phrase and its noun use.

Driving carelessly increases the likelihood of an accident.

In the sentence:

Driving carelessly increases the likelihood of an accident

The gerund phrase is ‘Driving carelessly’.

Gerund are verbs used as subjects in a sentence with the root word added by ‘-ing’. Verbs are simply known as the ‘action’ words - may it be mental, physical or mechanical. Nouns are names of a person, animal, place, event, etc. It could be proper or common noun.