As many as Bubba Gump named shrimp dishes, your local music store will carry at least five popular makes, an on-line store may have up to 25 makes.
Fender Catastrater makes the best bass guitars.
It makes it louder
Fernandez makes good bass guitars to play metal music.
Because of music theory. The bass guitar is played in the bass clef.
The guitar can be used as a guitar or bass.
Pretty much any company that makes guitars
Tone control adjust the bass, and treble. Treble makes the sound thin and high, and bass makes it lower and more full.
How is a Bass Guitar made?
The bass is considered a guitar... That's why they call it "bass guitar"
Bass guitar is used in most kinds of music. Funk makes it a central part of the sound, but in many cases the bass is a vital but oft-overlooked instrument. You can play whatever you wish on it.
Rock bands almost always feature a bass guitar, same with metal, punk, goth, grunge, emo, etc. Many more mainstream bands also feature either a bass guitar or something that makes bass guitar noise. Jazz also uses basses; there are a couple of bass trios in jazz.
Languedoc makes a good guitar that is used by Trey, the guitarist for Phish. Trey Anastasio is known for his bass and guitar work and has several custom made guitars and basses.