Answer:
1) Falso
2) O él
3) Ella habla español.
Explanation:
1) "tú" is the pronoun used to speak to someone in an unformal manner such as with friends and relatives. ""Usted is pronoun used to speak to someone in a formal manner.
2) "él" is the masculine version while "ella" is feminine. Tú"" is referring to the other person with no specification of gender and "yo" is referring to yourself.
3) As mentioned above "ella" is the feminine version that should be used, assuming that the sentence is referring to Sara speaking Spanish.