Correct spelling, explanation: safety is a noun made from the adjective safe. To create a noun from an adjective, we need to add the suffix -ty to its root. Therefore, safe + -ty is safety, not saftey. This is due to the rule we stick to when creating nouns.

Definition of safety:
noun, the state of being safe
John is going to improve the safety of his computer.
I will take a taxi tonight just to take care of my safety.

Incorrect spelling, explanation: when deriving a word, one must always look at its root. In this case, it’s the adjective safe. We can’t change the spelling of a basis, so saftey is a mistake. The correct form – safety – is a noun made of two elements: safe + -ty. No one should change anything in it.

Incorrect spelling

Incorrect spelling

Incorrect spelling

Incorrect spelling