What adaptations enable intertidal organisms such as barnacles and limpets to withstand wave splash and drying?

• A. Strong attachment mechanisms (byssal threads or cement); rigid shells or protective coverings; tolerance to desiccation and temperature swings.
• B. Weak attachment; no shells; intolerance to drying.
• C. Photosynthesis during low tide; escape into air.
• D. Burrow during high tide only.

Answer: (A)