In the phase of matter, atoms or molecules are held in a rigid structure. they are free to vibrate but cannot move around.

a. gas

b. solid

c. plasma

d. liquid

the answer is d (apex) good luck : ))

im not in connections yet but i might can you some questions. what grade are you in?

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 : )