What is a stimulus? What is a response? * 1 point

All of the choices are a stimulus / reaction pair.
A fire truck with loud sirens behind you. Pulling your car to the side so the fire truck can pass.
Hearing a rattle snake rattle while you are hiking. Stopping in your tracks and holding very still.
Your little brother pokes you with a stick. So you take the stick away.

WHICH ONE IS RIGHT

The ozone molecule o3 has a permanent dipole moment of 1.8×10−30 cm. although the molecule is very slightly bent-which is why it has a dipole moment-it can be modeled as a uniform rod of length 2.5×10−10 m with the dipole moment perpendicular to the axis of the rod. suppose an ozone molecule is in a 8000 n/c uniform electric field. in equilibrium, the dipole moment is aligned with the electric field. but if the molecule is rotated by a small angle and released, it will oscillate back and forth in simple harmonic motion.what is the frequency f of oscillation?