Answer:
escriben
Step-by-step explanation:
The tense used in this sentence is the present tense, which describes actions that are taking place at the current moment. Verbs ending in -ar, -er, and -ir are conjugated differently in the present tense, so it's important to remember the conjugated endings for the different types of verbs.
To conjugate a verb ending in -ar, remove the infinitive (the -ar) and add the appropriate endings: yo / tú / él, ella, usted / nosotros / vosotros / ellos, ellas, ustedes correspond to -o / -as / -a / -amos / -áis / -an. For example, hablar conjugated in the tú form would be hablas.
To conjugate a verb ending in -er, remove the infinitive (the -er) and add the appropriate endings: yo / tú / él, ella, usted / nosotros / vosotros / ellos, ellas, ustedes correspond to -o / -es / -e / -emos / -éis / -en. For example, comer conjugated in the nosotros form would be comemos.
To conjugate a verb ending in -ir, remove the infinitive (the -ir) and add the appropriate endings. The present tense endinings for -er and -ir verbs are the same other than in the nosotros and vosotros form. For -ir verbs, the conjugated nosotros ending is -imos and for vosotros it is -ís. For example, dormir conjugated in the nosotros form is dormimos.
**NOTE: The endings for -ar, -er, and -ir verbs are just general guidelines. Not every single verb will be conjugated the same way, one case being stem changing verbs.
Now we can conjugate the verb given in parenthesis to complete the sentence. Escribir is an -ir verb, so we should use the appropriate -ir endings. We see that the subject is los estudiantes, which falls under the category of "ellos, ellos, ustedes" because the subject is plural. Thus, the verb should be conjugated appropriately to reflect that. From what we learned, we can see that escribir conjugated in the third person plural form is escriben: Los estudiantes escriben la tarea.