Explanation:

- Here’s the thing: in law, a person is generally presumed dead if they haven’t been heard from in 7 years.

- Let’s break down the options:

- Option 1: 4 years—That’s not what’s used for legal presumption of death. Courts see this as too short; people go missing for many reasons and can turn up after a few years.

- Option 2: 7 years— This is the one. Under most legal systems, especially common law, after 7 years of total absence and no contact, someone can be legally presumed dead.

- Option 3: 10 years—Too long. No standard law says you have to wait a whole decade.

- Option 4: 15 years—Way longer than required; not used in law here.

- What this really means is: if nobody has seen, heard from, or communicated with a person for 7 years, the law recognizes it’s reasonable to presume they’ve passed away.