Correct Answer: Integrity

Solution : The correct choice is the second option .

Integrity is a noun that refers to the quality of being honest, having strong moral principles, and adhering to ethical values. It encompasses being truthful, upright, and having a sense of consistency in one's actions aligned with moral and ethical standards, which aligns with what is given in the question.

The meanings of the other options are as follows:

• Stuck up : This term refers to a person who is seen as conceited, arrogant, or snobbish.
• Uptight : This word describes someone who is tense, anxious, or easily agitated.
• Ridiculous : It is an adjective used to describe something that is absurd, laughable, or deserving of mockery because it is so unreasonable or nonsensical.

So, the most appropriate one-word substitution would be integrity .