Final answer:
The statement regarding the Mindanao design being okill is true. Okill is a significant aspect of Maranao and Muslim Filipino cultural art and architecture in Mindanao.
Step-by-step explanation:
The statement that one famous design in Mindanao is the okill design is true. Okill refers to the geometric and flowing designs and folk motifs that are characteristic of Maranao and other Muslim Filipino cultures. It is often seen in the intricate carvings and woven art in Mindanao, as well as in architectural details such as the iconic toboggan, a traditional Maranao royal house adorned with our patterns.
These designs play a significant role in the visual arts and culture of Mindanao, representing a rich tradition that has been passed down through generations.