If the birth rate doesnt change but the death rate goes down, what happpens to population

If this happens, the population will slowly increase

Birth and death rates, as well as migration, all influence population growth rates. There will be a decline in the workforce. The population size would not change if the birth and death rates are equal.

i think it's c

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.