Which of these that is made of smaller parts assembled for a purpose structure
form
function
force
weight
mass
direction
mass
load
magnitude
load
external force
internal force
stability

d statement

explanation:

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.