Final answer:
The preterite tú form of 'beber' is 'bebiste'. Spanish verbs are conjugated based on tense and subject; for 'tú' in the preterite tense, 'beber' is rendered as 'bebiste'.
Step-by-step explanation:
The direct answer, in two lines, is: the preterite tú form of the Spanish verb 'beber' is bebiste.
In the Spanish language, regular verbs are conjugated differently based on the tense and the subject of the sentence (i.e., who is performing the action). We're dealing with the verb 'beber', which is a regular verb. In the preterite tense, which is a past tense used to describe actions completed at a definite time in the past, regular verbs ending in '-er', like 'beber', have a particular set of endings. For the tú (you, informal) form, the ending is '-iste'. Therefore, 'beber' becomes 'bebiste' in the preterite tú form. The other options given, 'bebemos', 'beben', and 'bebo' are incorrect in this case because they pertain to other subjects or tenses ('bebemos' is the present 'nosotros' form, 'beben' is the present 'ellos/ellas/ustedes' form, and 'bebo' is the present 'yo' form).
Learn more about Spanish verb conjugation