Hello my friends! Please check the grammar and sense in the definition.
Dangerous - The situation isn't safe which can cause to an accident.

Question

Answer

"Dangerous - The situation isn't safe which can cause to an accident."

Just a small change is needed.
"Dangerous - The situation isn't safe which can lead to an accident."
OR
"Dangerous - The situation isn't safe which can cause an accident."

Answer

Dangerous is an adjective. So your definitionm should act like an adjective.
.
Dangerous - Describes a situation that isn't safe, for example, which could lead to an accident.

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