"diction" means word choice, aka the words that one chooses when writing or speaking. choice A uses this word correctly, because if you know more words, you'll be able to use "good diction" aka you'll have more words to choose from.
You would feel much colder if it’s windy because the cold air is hitting your body while your clothes are wet.If there is no wind then you still feel a little breeze but it’s not as cold.
Definition of aggregate. (Entry 1 of 3) : formed by the collection of units or particles into a body, mass, or amount.
I think it is the first on
many immigrants had no one but immigrant aid workers