Final answer:
The most precise way to say 'He is writing' in Spanish is 'Él está escribiendo.'
Step-by-step explanation:
The most precise way to say 'He is writing' in Spanish is option OB: Él está escribiendo.
In this sentence, the verb 'escribiendo' is in the present progressive tense, which is used to express an action that is happening at the moment of speaking. The auxiliary verb 'está' indicates that the action is happening right now.
Other options are incorrect: OA means 'He is talking,' OC means 'He writes,' and OD means 'He speaks,' which do not accurately convey the meaning of 'He is writing.'
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