Differences between sink and drown

[Hogh20]

Hi l have a question.would you mind telling me the differences between sink and drown?thanks

[Cerberus™]

When you sink, it just means that you move downward in the water; when you drown, it means that you suffocate because you cannot breathe underwater.

[Daemon99]

Sink is used with respect to objects like ships etc and drown for living things. People don't sink, they drown.

Is the above explanation correct? I think I read it somewhere.
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Non-native speaker of English
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