Which type of birth control protects against STD?
The best control is abstention.
Birth control is what is used to prevent unintended pregnancy, there are multiple different types of birth control that work in different ways, it is ignorant to say 'birth control' to mean one specific type of birth control. Without knowing what type of birth control you're referring to we cannot answer your question - some birth control does absolutely nothing to your hormones, some birth control completely shuts down your hormones.
Depends on the type of insurance. Life insurance protects against death, Car insurance protects against several different losses to your auto, home, workers comp, commercial, the list goes on and on as to the type of insurance and then within the insurance policy the covered loss list is extensive. You would need to be more specific for more than a general answer.