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.
Block any entry points
Eliminate sources of food, water, or shelter
A misconception commonly used when violence occurs in a dating relationship is that "he/she only hits me because he/she loves me". This however is not true. In a relationship, one will not abuse their partner out of love. it is not affectionate. it is purely out of rage, anger, low self-esteem, or upsetting circumstances.
It really depends, think of it as 2 light bulbs in each parent. if both light bulbs in both parents are switched on that means their genes that they inherited are only able to have brown eyed babies, although if just 1 of the 4 light bulbs are not on it allows the baby to have blue eyes.
