Jonah finds a rusty nail outside. the nail is an example of

Is it asking what's going on to the nail, cuz if so it's oxidation, or a chemical change. There is no multiple choice or context, so please excuse me if this is not what you're asking.

the answer is a) a shiprock was formed by igneous process

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.