Which type of weave is used to support hair extensions?

The correct choice is cornrow. Cornrows are a traditional African styling method where the hair is braided very close to the scalp in a continuous, raised row. This technique is particularly effective for providing a stable foundation for hair extensions because it creates neat, flat patterns that can securely hold additional hair.

The tightness and flatness of cornrows help manage the weight of the extensions, ensuring that they stay in place and reducing the risk of slippage. Additionally, cornrows can be styled in various patterns and directions, allowing for versatility with how extensions can be applied.

While other types of braids like a fishtail, Dutch, or French braid might be used in styling or securing hair temporarily, they lack the structural support and close-to-the-scalp technique necessary for effectively holding hair extensions. These braids are more suited to create decorative styles rather than serving as a base for extension application.