What is mechanical weathering?

a. the buildup of rock formations over time.

b. the breakdown of rock through mechanical disintegration and physical stress.

c. the buildup of chemical deposits on the surface.

d. the breakdown of rock through decomposition of chemicals.

The breakdown of rock through mechanical disintegration and physical stress.

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 : )