Answer:
B) 4
Step-by-step explanation:
1. It is either 3 or 4, since those are only two angles comparing the lighthouse and the boat.
2. The angle of depression is noted below the horizontal and above the actual line, and out of 3 and 4, 4 is the only angle that is below its corresponding horizontal.
So, the angle of depression from the lighthouse to the boat is 4.
