Answer: The basic answer could be because of the tectonics plates.
Explanation: Because when two forces act towards each other from opposite sides, rock layers are bent into folds.
One of the birth control which could also be classified as ineffective which describes the statement above is the withdrawal or also known as the pulling out method. This is also describe as ineffective because sometimes the pair who is performing the intercourse, in which the male will sometimes not realize that he has already ejaculated. This is one of the birth control method being used instead of using contraceptives.