Assimilate

A.

forget

B.

digest

C.

correct

D.

surprise

B!

assimilate : (of the body or any biological system) absorb and digest (food or nutrients)

The word assimilate is being define as learning something so that it can fully be understand to make it useful. It can also be define as adopting to the culture of another society or become fully part of the new society. Also, if the word is use scientifically, it can mean absorbing or digesting the nutrients or food.