The purple and sunflower are phototropism and the big tree and the little tree upside down are gravitropism.
What do you mean by gravitropism and phototropism?
Roots, in general, bend away from light (i.e. negative phototropism) in the direction of gravity, whereas stem-like organs orient their growth toward light (i.e. positive phototropism) and away from gravity (i.e. negative gravitropism).
In given images, the purple and sunflower are phototropism and the big tree and the little tree upside down are gravitropism.
Learn more about phototropism and gravitropism here:
https://brainly.com/question/1329216
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