Your answer would be proteins.
The kidneys maintain our body's water balance by controlling the water concentration of blood plasma. The kidneys also control salt levels and the excretion of urea. Water that is not put back into the blood is excreted in our urine.
If you mean why here you go then
YES!!!!!! FACILITATIVE YESSSSS. You are doing amazing sweetie you are correctamundo <span />
A. Fertility Awareness.
Birth control affects your hormones, and condoms block the sperm from fertilizing the egg, so the only reasonable answer is A.