1. Water can move among three phases — solid, liquid, and gas.
A. How does the movement of water molecules change when water goes from solid ice to liquid?
B. How does the movement of water molecules change when water goes from liquid to gas?

the answer would be 3

if the type of the food available changes, then the frequency of beak types will change, because birds with beaks more suited to the available food will be more successful over time.

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.