Answer:
I think this would be 3. Are responsible for phototropism
Step-by-step explanation:
I automatically know it isn't all of the above, because nowhere in my text does it say that auxins were discovered in Japan.
It also doesn't talk about it making flowers bloom, but it can be used to make seedless fruits.
However, it does talk a lot about phototropism, here is what my section says:
"The growth of a plant toward a light source is called phototropism. Auxins are responsible for phototropism."
If this is wrong I will edit it or comment it.
I hope this helps, have a purrrfect day!
Just finished the assignment it's 100% correct answer