1. which of the following is an example of a biographical story?

a magazine article

a memoir

a photograph

a documentary film

2. which of the following is an example of positive diction?

nonfiction

clean

scarce

expensive

3. which of the following is an example of an informational text that persuades?

a political speech

a study guide

a news article

a map legend

1) a memoir
2) clean
3) a political speech, since the speaker or the author is trying to convince you to vote for them or their policies

Here are the answers of the given questions above:
1. The correct answer would be the second option. An example of a biographical story is a memoir.
2. The correct answer would be the second option. The word that is an example of a positive diction is the word "Clean".
3. The correct answer would be the first option. The example of an informational text that persuades is a political speech. 

The answer to your question appears to be: hardworking