Identify the meaning of the idiom in the given situation.
I will always stand by my friend.

The correct option is Support in difficult situation.

Explanation:
An idiom is a phrase or expression whose meaning cannot be understood from the literal meanings of its individual words.

The idiom "stand by" someone means to remain loyal to them, defend them, or give them help and support, especially during challenging, stressful, or difficult times.

In the context of the given sentence, "I will always stand by my friend," it signifies a commitment to support the friend whenever they face difficulties, rather than physically standing next to them or being in a physical line.

Therefore, the correct meaning of the idiom in this situation is to Support in difficult situation.