Sanitation would be the biggest one. For example, all food being stored in clean places at the proper temperatures.
This should be stereotyping because it would be implying that all people of that age, occupation, race, or similar, are the same and belong in the same group.
Answer is a) a
Reason. Milk is a drink for children.
It’s not “an” drink for children or “the” drink for children. Unless there is an article somewhere you didn’t post I don’t know what d) no article means.
The figurative language is simile
