Why is pseudoscience bad?

Because psuedoscience is a collection of beliefs or practices mistakenly regarded as being based on scientific method.

And it is most of the time false

Explanation:

the motion of a pendulum is a classic example of mechanical energy conservation. a pendulum consists of a mass (known as a bob ) attached by a string to a pivot point. as the pendulum moves it sweeps out a circular arc, moving back and forth in a periodic fashion.

i think the answer is a, hope this : )