Dependence
Reliance
noun, verbal noun
Being reliant on something in order to exist is dependence or reliance.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
外国の資源に依存するのは危険だ。
Dependence on foreign countries for resources is dangerous.
サウジアラビアでは、国の収益の多くを石油に依存している。
In Saudi Arabia, much of the country's revenue relies on oil.
自分が携帯依存症だってことは認めます。
I admit that I’ve become dependent on my cell phone.