Read the sentence. to shine on the stage, a performer must create a dynamic connection with the audience. how does the infinitive in the sentence function? as a noun as a verb as an adjective as an adverb

In the sentence "to shine on the stage, a performer must create a dynamic connection with the audience" the infinitive is functioning as a noun. The infinitive is the base form of a verb. In English, the infinitive usually refers to the present infinitive, which is the most common. An infinitive is "to" plus a verb form. It can be used as a noun like in the sentence previously mentioned.

comfortable

explanation:

one type of the adjectives is predicate adjective. a predicate adjective is an adjective which follows a linking verb and modifies or refers back to the main subject of that linking verb.

it usually is used just before the noun it modies.

here in this example:

'penguins seem comfortable in the coolest habitats', comfortable is the predicate adjective which follows the linking verb 'seem' and modifies the noun.

line 5 is one of them idk the other one