Which dimension of grandparenting includes cultural needs and expectations of what grandparents are to do, such as passing on the family history to the grandchildren?

The correct answer is social dimension

Explanation:

This dimension involves common needs and hopes of what grandparents are to do, like telling their grandchildren the family history for them to keep on passing it on. Another example of this kind of dimension is when they teach to their grandchildren their religion, social and vocational values, how to behave in society, manners.  

explanation:

allergens: overstimulate the nerve system

neurotics: attack nerve cells

mutagens: damage or otherwise alter dna sequence

generators: cause defects during growth and development  

carcinogens: cause unchecked cell growth

i hope you get the idea according to me these are the effects that happened.