Streams usually have high levels because air mixes into the water as it splashes over rocks.

Explanation: At a regional level, however, ponds contributed most to biodiversity, supporting considerably more species, more unique species and more scarce species than other water body types. Streams typically supported fewer species and fewer unique species at local and regional level than either ponds or rivers.

May i please get brainliest i just need 1 more then im a expert

c)as speed changes, wavelength and frequency change.

everything changes!

one "light year" is the distance that light travels, through vacuum, in one julian year.   that's 365.25 days, of 24 hours each.