Question

Which of the following angles is an angle of depression?

Answer 1

we know that

The Angle of Depression. is the angle below the horizontal that an observer must look to see an object that is lower than the observer

in this problem

the angle  below the horizontal is the angle C

therefore

the answer is

The angle of depression is the angle C

Answer 2

ANSWER

The correct answer is angle C

EXPLANATION.

The angle of depression also known as the angle of descent is the angle through which you move your head to view an object below the normal eye level.

In the above diagram, the normal eye level is the dashed line and angle C is the angle of depression.