Lippe's loop is a type of contraceptive used as:

Give scientific reasons: Pregnancy can be stopped or prevented without artificial methods of family planning.

What is the surgical procedure called where the fallopian tubes are cut and the ends are tied?

Which of the following methods does not function as a contraceptive?

$Cu$ ions released from copper-releasing intrauterine devices $(IUDs)$:

This method is based on the fact that as long as the mother breastfeeds the child fully, the chances of conception are almost zero. Identify the method.