Question

In which sentence is the action arrow pointing in the correct direction? <––––– Maria opened the lock with her key. ––––––> Maria opened the lock with her key.

Answer 1

< - - - - - Maria opened the locked with her key.        ( is the answer) 

Answer 2

"––––––> Maria opened the lock with her key" is the correct answer.

That is because the action arrow points towards the receiver of the action. The receiver of the action is the lock and the lock was opened. So the verb comes first, open, and points ––––––> to the receiver, the lock.