Which plant hormone causes fruit ripening?

A hormone that induces fruit ripening is

Which plant hormone causes growth of lateral buds?

Plant hormone controlling fruit ripening is

Plant hormone controlling fruit ripening is

Plant hormone controlling fruit ripening is

Which plant hormone is released from an injured or over tip fruit which brings ripening of other fruits ?

Fruit vendor use carbide for ripening of fruits. But it is a dangerous practice. What hormone, is used for ripening of fruits under natural conditions?