Which of the following most accurately describes the pharynx?

It is the passageway for both food and air

Explanation:

The pharynx is also known as the throat, and it contains passageways for both food and air. When food is swallowed, a flap of cartilage called the epiglottis presses down to cover the opening to the air passageway.

the level of progesterone is low at the pre-ovulatory phase of the cycle but it gradually increases and the levels are high at the luteal phase. if pregnancy occurs, the level of progesterone will be high throughout the pregnancy.

if egg is fertilized and the mother gets pregnant, progesterone starts preparing the uterus for the implantation. it starts building up the lining of uterus and make it hostile of the period of pregnancy.