If a certain note is natural, it means that the specific note is played without any accidentals (sharps or flats)
The music gets louder
slowly!
Slow
pianissimo!
In musical terms, rinforzando means reinforced.
That's not a standard term in music.
Play loudly!
what do you mean
It means "smooth and connected".
A style or music is simply a characteristic that sets it apart from other types of music.
not negative
Tab is a form of music that many guitar players read.