Answer:
Looking for light
Explanation:
Since plants require sunlight in order to produce light, they need to be exposed to it. Now, since there are other plants attempting to do the same they have to grow higher so they don't get put in the others shadow and possibly die due to lack of sunlight.
Stream channeled flow of water,regardless of size
They depend on the amount of local rain fall.
All of the food have Carbon in them bc everything have carbon in it even humans