what are the streams and small rivers that feed into a main river

3 answers

https://www.google.com/search?source=hp&ei=J13cXLinGqiS0gKUxZnYDg&q=tributaries&oq=tributaries&gs_l=psy-ab.12..0l10.1829.4539..4827...0.0..0.140.1410.0j11......0....1..gws-wiz.....0..0i131j0i10.2PXqvo2m51g
1. B
2. A
3. C
4. A

100% :)
no lunchbox friends is 100% correct thx