Which of these is a permanent birth control method used by women?

The correct answer would be - tubal ligation or sterilization.  

Explanation:

The permanent birth control method or prevention from the pregnancy is tubal ligation in women, which is a surgical procedure that completely blocks, cut, or seal both the Fallopian tubes in women. It is a minimally invasive surgical operation called laparoscopy.

There are several temporary methods are available for birth control or pregnancy prevention, But most familiar and permanent used birth control is sterilization or ligation method.

Thus, the correct answer is - tubal ligation or sterilization.  

what effect does exercise have on the nervous system?

the answer is c.