When two streams of same order merge new stream is called?

Question

When two streams of same order merge new stream is called?

Answer 1

mergeing

Answer 2

a stream

Answer 3

DEPENDS THE PROCESS IS CALLED MERGING. THE MONONGAHELA AND THE ALLEGHENY RIVERS MERGE AT PITTSBURG AND THEY CALLED THE RESULTING STREAM THE OHIO

TO MY WAY OF THINKING THE LARGER OF THE TWO RIVERS SHOULD RETAIN ITS NAME. BUT THEY DIDN'T ASK ME.