Which three sentences describe ways that droughts harm savanna ecosystems? A. The decaying remains of organisms add nutrients to the soil.
B. Animals that eat plants die from lack of food and water.
C. The leaves of plants that need a lot of water to dry up
D. Dried leaves catch fire and cause wildfires.

B,C,D

Explanation:

The first answer does not harm the savanna, it helps it, so B,C,D are the correct answers.

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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