Rattling

[lift to the sky]

hey guys, I drive a Ford Bronco and it recently started making this rattling from under the truck. it seems to pick up more when i get near 20mph and then goes away after i hit 30mph but when i release the gas it comes back. i cant figure out were its coming from. do you guys have any idea?

[Ramination]

Something loose on your exhaust maybe?

[lift to the sky]

it could be. i looked at it and it didnt seem like it moved a hole lot. i was thinking it was something with my brakes cuz when i press on my brakes its gets louder. i cant figure it out. im just hoping its not the rear end making the noise.