habet is the third-person singular present active indicative form of the verb "habere" (to have).
Here's why there's no change in the first singular declension:
* Singular: The verb is already in the singular form.
* First Declension: Latin verbs are not declined based on "declensions" like nouns and adjectives. They are conjugated based on tense, person, and mood.
* Present Active Indicative: "Habet" is in the present tense, active voice, and indicative mood.
Therefore, the first singular declension of "habet" remains as "habet".