Demonstrating that your ideas are practical and reasonable is especially important when developing a speech on questions of
a. fact
b. policy
c. value
d. persuasion

The word that best fits in the context of this excerpt is d: persuasion.

"Demonstrating that your ideas are practical and reasonable is especially important when developing a speech on questions of persuasion"

Persuasion is an important device when making a political speech because the objective is to convince the audience yours is the best way of doing things.

with whom will you be coming to the party? this is written correctly.

pulling in the reader is important