How is solid water less dense than
liquid water

Its all about How cold the Tempurture is - 50 or Lower makes Compacted ice MUCH denser than Normal type of ice thats very Thin like Thin Glass cups..  Liquid water has Ablsolute no Attracked Atoms..Diff Types of atoms so its Very Momentomable.. | Correct me if i did some mistakes for that Example

ecotourism pay for conservation efforts.

all these collisions do one thing, and that thing is explained in the last option. when dusst, rocks and ice collide, they harden and form giant layers of rocks or hard ice.

d)   to harden materials to form different parts of earth’s layers

hope it ,

bioteacher101