No one would need "a thread" in English. You might "have a thread," but that means you have a thread hanging from your clothing. If you are sewing, you need some thread, or a piece of thread. "A thread" would only work for something like the threads in email or online comments, and you'd rarely say someone needs a generic one of those.
what is wrong I can write one of them the male version or the female one why are they forcing me to write both at once