Since its main purpose is to cover your genitals, none of the above.
If it is just to protect the legs then 2 or 3 does the job, but 2 looks impossible to create in reality unless you sew it around the spider. Maybe we are assuming the spider spins this around itself with its webs so maybe that will work.
1 is the old disgusting drunk that is shirtless and almost bursting out of his jeans
2 is as normal as it can look
3 is very seductive 😏😏
2 looks like a the head of a dick poking out
The question is not “how”. The question is “why”.
It would have to be 3 unless 1 and 2 had holes in the back or no spider web.