Which of the following hair properties indicates high porosity?

High porosity in hair refers to hair that is more open and able to absorb moisture quickly. This property often indicates that the cuticle layers are raised or damaged, allowing for increased moisture entry but also resulting in low moisture retention over time.

When hair is highly porous, it can easily take in water and other products but struggles to retain that moisture, leading to dryness and frizz. This is a critical characteristic to understand in the context of hair care, as it informs the types of products and treatments that are most appropriate for managing the hair's condition.

The other options do not align with the definition of high porosity. Resilience and strength pertain more to the structural integrity of hair, while smooth texture indicates a well-sealed cuticle that would be associated with lower porosity. Fast drying time is often a result of high porosity, but it does not directly convey moisture retention capacity, which is the core aspect of what indicates high porosity.