The verb that belongs to the first conjugation in Spanish is: hablan.
What is the verb?
Conjugation is a way of rendering a word in different forms of its verb composition. First conjugation verbs in Spanish end in -ar and "hablan" fits this pattern. Reciben is a verb that ends in -ir and belongs to the second conjugation.
Cremos is the first-person plural present indicative conjugation of "creer," which is a second conjugation verb and Creemos is the third-person plural present indicative conjugation of "creer," and it is still a second conjugation verb. So, the best option that shows first conjugation is hablan.