Is 'bio' the plural form of 'bio' or is there another expalanation it is not 'bios' please?
"Bio" is invariable. There is no "bios."
According to the Collins Robert French Dictionary, bios is the plural of bio.
But Larousse says "bio" is "adjectif invariable."
I was thinking of washing powder, so used biological, as organic only refers to foods.I should have remembered that this section is dealing with foods.
"Bio" and "Organic" are used equally in Southern California so "Bio products are very popular here" should be acceptable.