The answer is Fear-induced
The correct option is this: PLANTS NATURALLY GROW TOWARD A SOURCE OF LIGHT.
Darwin carried out an experiment in which he found that when the tip of a plant is covered with an opaque material, the plant grow up straight but when it is covered with a transparent material that allow light, the plant bend toward the source of light. He thus, concluded that the tip of the plant is responsible for sensing light which is needed for photosynthesis.
1) It could lead to the cure of cancer which would save so many lives.
2) It would lead to discoveries on different illnesses and possibly how to treat them.
Acceleration
this part is so i have enough characters for it to accept
A tree wouldn't be part of the environment of a goldfish.