Water, and an atmosphere
Earth is the only planet known to support any kind of life.
they can erupt in any kind of weather
To get weather, you need an atmosphere. Mercury is the only planet without one.
A tsunami can come during any kind of weather, as they are not weather-related.
Paris has occasionally had unusual weather. This is something that can happen anywhere on the planet at any point in time.
It mostly lives in warm weather. But it can be in any kind of weather. Except of winter
Mercury has no atmosphere to speak of, and therefore it has no weather.
No, Mercury barely has an atmosphere and so it does not have any weather to speak of.
There must be water in order for any life to exist on this planet.
because
Weather and tsunamis aren't related, so tsunamis can happen during any kind of weather.
Yes. The usual snowfall is around 40-50 cm a year.