What statement best illustrates how an organism maintains homeostasis ?

a)female barn swallows mate with long-tailed males.

b)desert pack rats are active at night to conserve water.

c)parents pass their traits to their offspring.

d)young hawks have different kinda of feathers than adult hawks

B) Desert pack rats are active at night to conserve water.

Explanation:

Homeostasis is the ability or quality of the body to maintain the internal temperature constant and stable with respect to the changes occurring in the external environment. This involves maintenance of the internal temperature, pH, and conservation of water.  

B is the correct option this is because of the fact that in desert water conservation will be the beneficial adaptation. The rat may experience dehydration in day but water will not be lost in night. This will help in maintaining the homeostasis.

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.

d. groundwater flows through the subsoil and deposits minerals.