I personally would choose the board game fundraising
Even though this not applicable for all, the large majority of book readers belong to the introvert personality side.
Because of this, activities that made into fundraising should be something that appealing to introverts in General (which definitely acceptable by extroverts since they basically good in all social situations), such as board game fundraising.

write a thesis statement

Explanation:U would chose the board game but it may not be agreeable to all people many book readers belong to the other choice but the board game is more entertainging/ explicit

what are the sentences?

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.