In this exercise you have to complete the blanks choosing the correct words. You must choose one of the verbs with the correct pronoun. "Pamela" is a woman's name in Spanish so to replace this name we need a female singular pronoun like "la". The two posible options could be "sabe, la" or "conoce, la". However, "saber" is a verb that doesn't have sense in this sentence: Camila <em>sabe </em>a Pamela, la conoce de su vecindario. As you can see, this sentence is odd. So the best option would be the following:
<em>Camila </em><em>conoce </em><em>a Pamela, </em><em>la</em><em> conoce de su vecindario.</em>