1. Sun-Yee is comparing the substances and hot water inside a ceramic cup, and the water vapor above the cup. What can she say about the motion of the particles in all of the substances?

the corpus luteum secretes estrogens and progesterone. the latter hormone causes changes in the uterus that make it more suitable for implantation of the fertilized ovum and the nourishment of the embryo. if the egg is not fertilized, the corpus luteum becomes inactive after 10–14 days, and menstruation occurs.

i hope this : )

i think it is d. objects resist changes in their state of motion.