2 types of tropism?

Question

I am stuck on a question on my biology homework and i need anybodys help. Heres the question:

# 10) Describe two or three examples of tropism in plants and explain the role of auxins in these responses.

Thanks in advance.

Answer 1

gravitropism and umm..theres a light one..light tropism i think its called. gravitropism allows the roots of a plant to grow down and is a plant is exposed to light, it will grow toward it

Answer 2

gravitropism, phototropism and thigmotropism. tropisms result from differential growth = one side grows faster because the auxin concentration differs