Answer:
SUMMARY OF THE STORY HOW THE ANGELS BUILT LAKE LANAOLong time ago there was a place called Mantapoli and its population was numerous. Because of its rapidly increasing in power and population, too, the equilibrium between Sebangan(East) and Sedpan(West) was brokenThis problem soon to came to the attention of Archangel Diabarail. He go to the heaven and told to Allah about it. Sohara, the voice of Allah told that Diabarail will go to the Seven-Regions- Beneath-the-Earth and the Seven-Regions-in-the- Sky to summoned the angels and when Allah made the barahana(solar eclipse), they will remove Mantapoli and transfer it to the center of the earth. The veryspot vacated by the sultanate of Mantapoli became a huge basin of deep, blue water-the present Lanao Lake.When Diabarail saw the rising tides, he immediately returned to heaven to report to Allah. He told that the rising water from the basin can cause the people drowned. Allah commands to Diabarail to summon the Four Winds of the World:Angin-Taupan, Angin-Besar, Angin-Darat, and Angin-Sarsar, and blew the overflowing water and makes an outlet. Diabarail obey that command. After three trials, they successfully make an outlet that they called now as Agus River
