Question

to be (estar)
él está estar
vosotros estáis él es

Explanation:

The problem is about Spanish verb conjugation for "to be" (estar). We need to identify the correct form. "Él está" is the correct conjugation of "estar" for the third - person singular (he is). "estar" is the infinitive, not a conjugated form for a specific subject. "Vosotros estáis" is for the second - person plural (you all are), and "Él es" is the conjugation of "ser" (another verb for "to be") for third - person singular, not "estar".

Answer:

A. Él está