Concept:
Terpineol is a monoterpene alcohol commonly found in essential oils and perfumes.
Step 1: Identify the important structural features.
Terpineol contains:
• A cyclohexene ring
• One double bond
• A tertiary alcohol group
• Methyl substituents
Step 2: Match the structure.
Among the given structures, structure 1 correctly represents the arrangement corresponding to terpineol.
Hence:
\[
\boxed{1}
\]