What is the movement of the leaves of the sensitive plant Mimosa pudica called?

Correct answer: (d) None of the above

Explanation

The folding of the leaves of the sensitive plant (Mimosa pudica, touch-me-not) when touched is seismonasty (thigmonasty): a movement in response to touch or shock.

Chemonasty responds to chemicals, thermonasty to temperature and hydrotropism is growth towards water, so the answer is "None of the above".