Immersive Reader%0D%0AThe leading edge where one weather system meets another is called a(n)%0D%0AA%0D%0Aair mass.%0D%0A%0D%0AB%0D%0Ajet stream.%0D%0A%0D%0AC%0D%0Aanticyclone.%0D%0A%0D%0AD%0D%0Aweather front.

D. weather front.