Varieties as different species yes, as in colors no.
They occur natually; there is no reason behind them.
Hamsters are natually nocturnal, so you should let it sleep during the day.
No, serious fighting will occur, they are very territorial
no. but this does occur when you feed he/she to much fruit or vegetables
The correct name for a pet hamster (not including the dwarf varieties) is a Syrian, or Golden Hamster. There are many unofficial names for the species, some refer to colouration, 'black bear hamster' for example. Some refer to fur style, like 'teddy bear hamster', or a mixture, 'fancy hamster'. However none of these are actual species in of themselves, they are all Syrian Hamsters.
No A hamster is a mammal and needs the oposite sex to become pregnant
you can not choose when you get your period it just comes natually.
they are not natually made
Language varieties occur when a group of people split off from another and eventually develop their own norms and cultures which then shapes and changes their language.
No vet will neuter a hamster unless it's needed due to an emergency. Hamsters (including dwarf varieties) are generally too small and frail to undergo surgery requiring general anaesthetic, most likely that would kill them.
not you all humans do in that way.
if the bears extint ALL the ENVIRONMENT is going to be along and with 0% of natually help the people to learn others to love our god that gave us the natually