To add more detail, “eyebrow threading” is a means of plucking excess hair around the eyebrow using two strands of thread twisted together. It’s faster and less painful than plucking with tweezers.
As to the issue of Hindu dietary restrictions. As others have said you have to ask. Unlike the Abrahamic religions, Hinduism is not based on a central dogmatic text, and, indeed, all indications are that the authors of the oldest texts had no food restrictions.
So, food restrictions among Hindus have arisen culturally over tens of centuries. And it doesn’t really help to ask what a person’s “sect” is because only a small proportion of Hindus explicitly ascribe to any particular “sect.” Most of them just consider themselves “Hindus.”
The biggest differences are between meat-eating Hindus and vegetarian Hindus. Usually this goes by a family/ethnic group division (e.g., Bengalis are meat-eaters; Gujratis and south Indians are vegetarians), but there are some variations by individual. For example, it’s not uncommon in a meat-eating Bengali family for there to be a few women who have chosen to be vegetarian.
There is a further problem, however, in that there is not a fixed definition for “vegetarian.” General “Hindu vegetarian” means no flesh of any kind (land, sea, or air), no eggs, but dairy is not restricted. “Pure vegetarian” means all the above, but, in addition, no garlic or onions. “Jain vegetarian” means no root vegetables as well.
Among meat-eaters, the trend is for educated, middle-class men, in particular, to have no food restrictions whatsoever, not even beef.
So, basically, ya gotta ask.