Adaptations may occur when an individual needs to survive a dangerous situation an individual wants to attract a mate a species wants to move to a new environment a trait is advantageous and is passed through generations

The correct answer is D.

D.) a trait is advantageous and is passed through generations

There are different kind of adaptations that occur in the life of organisms. Adaptations actually help organism to blend with their environment and are necessary for the their survival. When organisms found a trait useful for them, they adopt it and with the passage of time they inherit that trait to their off springs.

the cytokine-activated janus kinase (jak)-signal transducer and activator of transcription (stat) pathway has an important role in the control of immune responses. dysregulation of jak-stat signaling is associated with various immune disorders.

as the gila monster consumes the eggs or young of the desert cottontail and gambel's quail, thus its main food supply is only accessible for a restricted time duration every year. however, for this, the gila monsters exhibit three adaptations, which elevate their survival rate in the desert condition.  

first, is that they possess huge bodies, and can consume greater concentrations of food during a small period. secondly, they require to feed infrequently as they can accumulate fat in their tails. ultimately, their rate of metabolism is very low, so that they can burn their reservoirs of fat gradually.