'Elevated' means 'situated at a higher place'.
Option B - 'Deep' means 'far down from the surface.' Hence, option B is incorrect.
Option C - 'Strong' means 'to be powerful.' Hence, option C is incorrect.
Option D - 'Right' means 'to be correct/on the right.' Hence, option D is incorrect.
Option A - 'High' means 'of great vertical extent/elevated'. Thus 'high' is the synonym of 'elevated'. Hence, option A is the correct answer.
'High' is the synonym of 'elevated'.