What is the screeching sound from front tires?

I have an 08 Honda Civic Ex. Every time i initially drive my front tires start to screech wile i'm driving. They stop making the screeching noise after i i start to break hard or pump breaks. No brake lights or check engine appear on my dash board.

Added (1). They make the noise while i'm driving straight.

Those are the pad wear indicators rubbing on the disk. Get the pads replaced.

Tire pressure is too low.

Brake sensor, you must change your pads right away or it will go into your rotors and that will cost BIG bucks