Select the sentence that uses the given idiom correctly.
Have your head in the clouds

The correct option is: "He had his head in the clouds during an important meeting."

Understanding the Idiom:
The idiom "have your head in the clouds" means to be inattentive, daydreaming, or lost in thought, and not paying attention to what is happening around you. It refers to a state of being unfocused or unrealistic rather than physically being high up or looking at actual clouds.

Evaluating the Options:
1. "He had his head in the clouds during an important meeting." - Correct. This correctly uses the idiom figuratively to describe someone who is daydreaming or failing to pay attention during a business meeting.
2. "The pilot had his head in the clouds while flying a plane." - Incorrect. This uses the phrase in a literal sense (flying through actual clouds), which misses the idiomatic meaning.
3. "They had their heads in the clouds by looking up at the sky during a meteor shower." - Incorrect. This also interprets the idiom literally (looking up at the physical sky).
4. "She had her head in the clouds by wearing a cloud-shaped hat." - Incorrect. This describes a literal, physical object shaped like a cloud, rather than the mental state of daydreaming.