Final answer:
To use a linking method of hair extension attachment, natural hair should be at least 3 to 4 inches long to ensure secure attachment and a natural blend with the extensions.
Step-by-step explanation:
To use a linking method of hair extension attachment, natural hair should be at least 3 to 4 inches long. This length is necessary to ensure that the extensions can be attached securely and blend naturally with the person's hair.
If the hair is too short, the link attachments may not hold properly, leading to a risk of damage to the natural hair, or slippage of the extensions. It is always best to consult with a professional hairstylist before getting hair extensions to assess the suitability of your hair length and to get advice on the best type of extension for your hair type and lifestyle.