The Flute does not use a reed.
To make a sound, you blow across the hole in the mouthpiece, kind of like if you have ever blown across the top of a bottle to make a sound.
To change the sound, you press down on the keys.
The Flute sounds high.
The Bassoon is large. It is folded in half, but if unfolded, it would be 8 feet 4 inches long.
It uses a Double Reed.
It sounds low.
The Bassoon is sometimes called "the clown of the orchestra".