The sentence contains a subject-verb agreement error; the correct form is 'A tornado and a hurricane inflict great damage...'
The sentence 'A tornado and a hurricane inflicts great damage, but hurricane damage covers a larger area.' contains a subject-verb agreement error. The subject 'A tornado and a hurricane' is plural because it refers to two entities, therefore, the verb should also be plural. The correct sentence should be: 'A tornado and a hurricane inflict great damage, but hurricane damage covers a larger area.' By changing 'inflicts' to 'inflict', we correct the grammatical error and ensure that the subject agrees with the verb.
The error in the sentence is the subject-verb agreement. The subject of the sentence is 'A tornado and a hurricane', which is plural. However, the verb 'inflicts' is singular. To correct the error, the verb should be plural to match the subject. The correct sentence would be: 'A tornado and a hurricane inflict great damage, but hurricane damage covers a larger area.'