In this diagram, point P is the orthocenter of AABC.How is the orthocenter of atriangle found?

SOLUTION
Recall the definition of orthocenter of a triangle
The orthocenter of a triangle is the point where the perpendicular drawn from the vertices to the opposite sides of the triangle intersect each other.
Therefore from the options the right answer is:
By drawing a line from each vertex that is perpendicular to the opposite sides.