Fossil fuels formed before the age of the dinosaurs. Some formed from ancient plants and organisms. These plants and

organisms turned into a spongy material called

clay

mulch

peat

sand

Peat

Explanation:

peat is often used as fuel in gardening. the rest of the choices are not a "spongy" material either.

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.

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