I&#x27;m going to assume it has to do with the crystalline structure of ice. Crystals like to have a very specific structure, so there&#x27;s only a few particular ways for it to grow from a given point. For instance, the three-plane symmetry is going to be due to the hexagonal shape of ice crystals [0]. That&#x27;s also going to inform how branches of branches are formed; note that secondary branches are all parallel to the sides of the entire hexagonal structure of the flake [1].<p>[0] <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Ice_crystals#Geometry" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Ice_crystals#Geometry</a><p>[1] <a href="http:&#x2F;&#x2F;static01.nyt.com&#x2F;images&#x2F;2016&#x2F;01&#x2F;22&#x2F;science&#x2F;22Snowflake3&#x2F;22Snowflake3-superJumbo.jpg" rel="nofollow">http:&#x2F;&#x2F;static01.nyt.com&#x2F;images&#x2F;2016&#x2F;01&#x2F;22&#x2F;science&#x2F;22Snowflak...</a>