What are the theories about the origin of the Philippines?

The Land Bridges Theory,

Plate Tectonics theory,

Sunda Shelf theory,

Volcanic theory &

the Continental Drift theory...

or

Philippines was once a part of Eurasia Plate that time we are still connected with China by the Land Bridges, as time pass by and earthquake and sea level rises these Land Bridges was sunken by the sea. As you can see in the map Batanes group of island looks like connected to Taiwan this where part of Land Bridges before.

Earthquakes and plate tectonic form our land masses, the reason why we got a 7,000+ islands is we are located in the Pacific Ring of Fire which is for thousands of years we always experienced a number of strong and moderate earthquake that causes some undersea landslide and separating land masses. Same also with the case of Japan, Indonesia, Northern Mariana Islands and Aleutian Island in Alaska.

Another short answer is just read the your bible on how God created the world.

or

There are kinds of theories:

* Scientific

* Biblical

* Mythical...