Concept:
Passive voice focuses on the object receiving the action.
Step 1: Identify structure of active voice.
\[
{Subject (storm)} + {Verb (destroyed)} + {Object (houses)}
\]
Step 2: Convert to passive voice.
\[
{Object} + {was/were + past participle} + {by subject}
\]
Step 3: Form sentence.
\[
{Many houses were destroyed by a strong storm}
\]
Step 4: Evaluate options.
- (A) \checkmark correct passive form
- (B) $\times$ active voice
- (C) $\times$ incorrect grammar
- (D) $\times$ wrong meaning
Hence, the correct answer is option (A).