Final answer:
The correct option is 'Habrá'. It is the future tense of the irregular verb 'haber' meaning 'there will be'.
Step-by-step explanation:
The correct option is Habrá. The sentence is talking about the future and the erosion on the beaches. Therefore, we need to use the future tense of the verb. Habrá is the correct form of the irregular verb haber in the future tense for the third person singular. It means 'there will be'.
Learn more about Future tense of irregular verbs in Spanish