Respuesta :
The correct answer is option A, that is, thigmotropism.
Thigmotropism refers to a directional growth movement that takes place as a mechanosensory reaction to a touch stimulus. Thigmotropism is usually found in tendrils and twining plants, though plant biologists have also discovered thigmotropic responses in fungi and flowering plants.
This behavior takes place due to unilateral growth inhibition, that is, the rate of growth on the side of the stem that is being touched is gradual in comparison to the side opposite to touch.
