Answer:
The right Object Pronoun that fills the blank is:
<em>- </em><em>El padre </em><em><u>le</u></em><em> regaló un coche a su hijo, Pablo.</em>
Explanation:
The translation of the sentence is:
- The father gave a car to his son, Pablo.
The Object Pronouns are used taking into account the personal pronoun used within the sentence, in this way you can find the following:
- <em>Yo: </em><em>me</em><em>.</em>
- <em>Tú: </em><em>te</em><em>.</em>
- <em>Él/Ella/Ello: </em><em><u>le</u></em><em>.</em>
- <em>Nosotros: </em><em>nos</em><em>.</em>
- <em>Ustedes/Ellos: </em><em>se</em><em>.</em>
Taking into account that the noun used within the sentence is <em>"El padre"</em> who can be replaced by the personal pronoun <em>"él"</em>, the right object pronoun that applies for it is <u><em>"le"</em></u>.