Question

Match the description to the term.

1.unified

2.able to be proved or demonstrated

3.clearness

4.giving a picture of something in words

5.manner of development or overall plan of an essay or nonfiction writing

6.cheerfulness, sadness, or nostalgia

Answer 1

Being unified could be concise.
Being abled to be proved or demonstrated could be validation. (Bad question)
Clearness could be clarity. 
Giving a picture of something in words could be description. 
Manner of development or overall plan of an essay or nonfiction writing could be organization.
Cheerfulness, Sadness, or Nostalgia could be one's dominant mood.

Answer 2

1.unified - to be joined together
2.able to be proved or demonstrated
3.clearness - very obvious
4.giving a picture of something in words
5.manner of development or overall plan of an essay or nonfiction writing
6.cheerfulness, sadness, or nostalgia