Answer:
An African-American inventor and engineer, Otis Boykin had a special interest in resistors. His mother died from heart failure when he was 1 year old. Thirty-one years later, he filed a patent for a resistor that paved the way for his most notable invention, the pacemaker control unit.
Answer: Controller
Explanation: plz mark brainlist
Menstruation is the process in which the uterus sheds blood and tissue through the vagina. This is natural and healthy in girls and women of reproductive age. Western communities call this a period.
