Out of the four alternatives given, choose the one which can be substituted for the words A notice of a person's death.

Introduction / Context:
This one word substitution question focuses on a term commonly seen in newspapers and magazines. The phrase A notice of a person death refers to a short written announcement that informs readers of someone passing away, often including brief details of their life. The correct word for such a notice is important in both general knowledge and English vocabulary sections.

Given Data / Assumptions:

• Description: A notice of a person death.• Options: Memorandum, Obituary, Reminder, Rejoinder.• We assume standard newspaper terminology.• The required word must refer to a published announcement of death.

Concept / Approach:
The word obituary is specifically used for a notice of death, often including a short biography and details of funeral arrangements. Memorandum refers to a written message or record, usually within an organisation. Reminder is something that helps someone remember, such as a note or message. Rejoinder is a reply, especially a sharp or witty answer. Out of these, only obituary matches the description given in the question.

Step-by-Step Solution:
Step 1: Focus on the key idea in the description a written notice that someone has died.Step 2: Recall that newspapers have a section titled Obituaries where such notices and tributes are printed.Step 3: Examine obituary, which directly means a notice or article about a person death, often in a newspaper.Step 4: Check memorandum, which usually refers to a short official note used inside offices or organisations.Step 5: Consider reminder, which is something that helps you remember tasks, events, or facts, not deaths specifically.Step 6: Look at rejoinder, which is a reply to a comment or criticism, far removed from the idea of a death notice.

Verification / Alternative check:
Think of sentences such as The family placed an obituary in the local paper or The newspaper carried a moving obituary for the famous writer. Replacing obituary with memorandum, reminder, or rejoinder makes the sentence sound absurd. Also, many English newspapers clearly label the section for death announcements as Obituaries, confirming that this is the standard term used in journalism for a notice of a person death.

Why Other Options Are Wrong:
Memorandum does not convey the idea of death at all and is mainly used for official internal communications. Reminder is generic and could refer to any prompt, but is not tied to the event of death. Rejoinder is a sophisticated word but refers to verbal or written replies in debates or conversations, not to announcements of someone passing away. None of these choices fit the specific function described in the question.

Common Pitfalls:
Students may be attracted to long or formal sounding words like memorandum or rejoinder, thinking that a complicated event like reporting a death must use a complex term. However, vocabulary questions often reward recognition of words seen in everyday contexts such as newspapers and news websites. Remembering where you have seen the word used in real life, for example on obituary pages, will guide you to the correct answer.

Final Answer:
The one word substitute for A notice of a person death is Obituary.