Which of the following describes the asthenosphere? OA. the outermost solid layer of the Earth that forms the tectonic plates
&
OB. a liquid earth layer directly surrounding the core
Oc, solid, slowly moving layer on which the tectonic plates float
OD. liquid layer that, along with the crust, forms the lithosphere

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Explanation:

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the level of progesterone is low at the pre-ovulatory phase of the cycle but it gradually increases and the levels are high at the luteal phase. if pregnancy occurs, the level of progesterone will be high throughout the pregnancy.

if egg is fertilized and the mother gets pregnant, progesterone starts preparing the uterus for the implantation. it starts building up the lining of uterus and make it hostile of the period of pregnancy.

the answer to your question is tooth decay.