A concrete noun is used through your five senses. They can be:
-Common nouns
-Proper nouns
-countable and uncountable nouns
-collective nouns
I hope this helps.
I think C dashes would represent a pause
I believe it will be a cause and effect type of essay.
I hope this helps
Maybe he meant that for him is hard to write or create a realistic idea about what to write and how.