How could this statement be revised to make it a hypothesis?
a.)fish meal is safer than artificial fertilizers, but it does not make plants grow.
b.)fish meal is a better fertilizer than artificial fertilizer because fish meal is natural.
c.)plants that are fertilized with fish meal will grow taller than plants that receive artificial fertilizer.
d.)plants that receive artificial fertilizer will be better than plants that receive fish meal.

I believe the answer is : c.)Plants that are fertilized with fish meal will grow taller than plants that receive artificial fertilizer.

When making a hypothesis, you should try to make the variable as clear as possible. The word "better" is not specific, so it would be hard to know what aspect you want to research. It also better to separate the hypothesis and not combining two hypothesis together like option A and option B. You can identify the independent variable clearly in option C .

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.

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.