Question

This plant needs to grow high up in the canopy of the rainforest. It needs support as it moves up the stems and branches of larger trees. The tendrils here know when to cling to their support. This response by the climbing plant is called A) gravitropism. B) hydrotropism. C) phototropism. D) thigmotropism. Biology katieb

Answer 1

I wanna say A..  
Hope this helps :D