In wich object dose the solar systyem conform as the coldest place in the wold

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?

The eruption of a nearby volcano causes a prairie ecosystem to receive a lot less sunlight. which of these is most likely effect on the ecosystem?

When does an organism become an adult during a life cycle? a)before metamorphosis is complete b)after producing offspring c)after development is complete d)before gametes fuse