Explanation:

- Deference is a noun meaning respectful submission or yielding to the judgment, opinion, or will of another. It implies showing respect for another's authority or seniority.

- Option 1: Ignorance - This refers to a lack of knowledge or information. It's unrelated to showing respect, hence not a synonym for deference.

- Option 2: Contrast - This means to compare in a way that highlights differences. It does not relate to the idea of respect.

- Option 3: Delay - This involves postponing an action or event. It doesn't connect to respect or submission.

- Option 4: Obeisance - This is an act of showing respect, such as a bow or curtsy. It aligns closely with the idea of deference, which is about respectful submission.