Final answer:
The correct form of the verb escribir is escriben.
Step-by-step explanation:
Los alumnos escriben con lápiz.
The correct form of the verb escribir to complete the sentence is escriben. When referring to a group of students, the verb form used is escriben.
For example, 'Los alumnos escriben con lápiz todos los días.' (The students write with a pencil every day.)
Learn more about Spanish verb conjugation