They reduce pregnancy because the delay the uterus releasing the egg, and delay ovulation. Less than 1% of women who use IUDs pregnant, although pregnancies after the emergency contraceptive pill are not as rare.
Respiratory system I think. I MAY BE WRONG.
Hope I helped!
Answer:The design elements (line, shape, space, colour, texture, tone) are used in a way to construct the design principles (balance, emphasis (contrast and proportion), dominance, unity (proximity and repetition), pattern, movement).
Wear PPE(personal protective equipment) like gloves or masks.
