What part of speech is the highlighted word in each sentence?

Choose the correct option.

Jack has got straight hair. [Noun|Verb|Adjective|Adverb]

Mia's father has got a moustache. [Noun|Verb|Adjective|Adverb]

My mother doesn't like to get up early. [Noun|Verb|Adjective|Adverb]

I like to go for walks in the park. [Noun|Verb|Adjective|Adverb]