This is the 3616th most frequent Russian word.
сохранению
"Сохранению" means "to preservation" or "to conservation" (dative case of "сохранение").
Сохранению is used in the dative case to indicate the purpose of the event.
Это мероприятие посвящено сохранению природных ресурсов.
This event is dedicated to the preservation of natural resources.
Сохранения is used in the genitive case as part of the prepositional structure 'для сохранения' meaning 'for the preservation of'.
Для сохранения здоровья важно регулярно заниматься спортом.
For the preservation of health, it is important to exercise regularly.
Сохранению is used in the dative case as the object of the verb 'уделяет'.