You are not allowed to place appositives at the end of the sentence.
True
False

Apposition means that something is next to each other. "The mouse is of apposition to the keyboard" is a grammatically correct sentence, so I'd say true, because it's grammatically correct!

some attention getter quotes to support your thesis regarding brain work could be the following: :

a. storage capacity of your brain is virtually unlimited.

b. your brain produces sufficient electricity to light-up a small bulb.

c. different brain circuits are involved with reading aloud or silently.

d. your brain by itself does not feel pain.

e. reading allows your brain to download info directly.

f. brains of two musicians performing together can synchronize.

i think the answer would mist likely be an adjective clause, because unhappy is an adjective.