The answer is four, el hermano, because the arrow is pointing to a boy. Hermano means brother, hija means daughter, abuelo means grandmother, and hermana means sister. You can tell that hermano means brother because it ends in 'o', signifying that the word is masculine. Hermana and hija are feminine, so it can't be either of those too. It can't be abuelo, either, since the arrow is pointing to a little boy. I hope this was helpful to you!
