Emergency contraception reduce the risk of pregnancy by stops the release of eggs from the ovaries, hence option A is correct.
Emergency contraceptives do not cause an abortion, but they do prevent or delay ovulation, which prevents pregnancy. By preventing sperm from fertilizing the egg, the copper-coated IUD prevents conception. The implantation of a fertilized egg in the uterus may also be hampered.
Similar effects are produced by a progestin-coated IUD, which likewise thickens cervical mucus and thins the uterine lining. The copper-containing IUD stops fertilization by altering the chemical composition of the sperm and egg before they come into contact.
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Explain the importance of fluids and electrolytes during exercise.
When you exercise, you lose electrolytes like sodium. They need to be replaced. That's why you drink fluids when you exercise. You lost electrolytes and you need to gain more.