Translate the phrase "to walk" into Latin.

The phrase "to walk" translates into Latin as "ambulare." This form is known as the infinitive, which is the base form of a verb and expresses the action without specifying a subject or tense. In Latin, infinitives play a crucial role in constructing sentences and can often be used in various grammatical constructions.

The other options represent different forms connected to the verb "ambulare." For instance, "ambulans" is the present participle meaning "walking," which describes the action currently taking place. "Ambulat" is the third person singular present indicative form, meaning "he/she/it walks." Lastly, "ambulo" is the first person singular present indicative form, translating to "I walk." Each of these forms conveys different nuances of the action but does not provide the general infinitive meaning that "ambulare" does.