In Spanish, we use <em>los mandatos</em><em> </em>to talk about commands. So, the <em>informal commands</em> are also called <em>the informal imperative. </em>For the informal commands we use <em>tú </em>as the singular form. In this way, we use this type of commands to tell a friend, a pet, a family member, a child, a classmate, a partner, among other, to do something. This problem stands for the affirmative form. So, for the affirmative form, the conjugation of the verb we use is the <em>third-person singular</em> in the present simple. The verb is hablar and the correct conjugation is habla.
So, <em>the right answer</em> is: Habla
