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.

it enhances antibody production by t cells of the adaptive immune system.

hope i'm right

explanation:

the answer is c. it will give up it's valence electron to the other atom.