Which of the following illustrates mechanical weathering 1 carbonic acid wearhers marble and limestone 2 as plants grow they produce weak acids that slowly dissolve rock 3 ocidation causes weathering in rock 4 reapeated freezing and thawing in rocks causes weathering

they deliver oxygen to the blood

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 : )