$\"\"$

Observe the figure:

From the figure $\"\"$ .

The angle of elevation from the boat to the top of the cliff is congruent to the angle of depression from the top of the cliff to the boat because they are alternate interior angles of parallel lines.

The angle $\"\"$ and $\"\"$ .

Consider $\"\"$ .

$\"\"$ .

$\"\"$

Therefore,the choice $\"\"$ is correct.

$\"\"$

The choice $\"\"$ is correct.