Odd one out 1.geyzer,spring,deep. 4.fresh,fish,clean. 2.lake,like,river....

Question

Odd one out
1.geyzer,spring,deep. 4.fresh,fish,clean.
2.lake,like,river. 5.meter,water,air.
3.see,sea,ocean. 6.salty,crystals,windy.

Answer 1

1.spring;2.like;3.see;4.fish;5.meter;6.crystals;