Birth control methods that involve the woman receiving a combination of estrogen and progestin, (as the pill, or as patch, ring or injection)function as birth control by

The answer is hormonal.

Explanation:

There are two main methods of birth control for both men and women, which are either hormonal or barrier birth control methods.

Condoms for both men and women are in the barrier control methods, also cervical caps.

But as the name suggests, methods that involve taking hormones such as estrogen, progestin etc. by means of swallowing a pill or otherwise are a part of the hormonal birth control methods.

I hope this answer helps.