The conclusion is that the pillar corals are heavily dependent on the sunlight in order to survive and flourish.
In warm waters, other organisms compete with them, and the pillar corals are out-competed, so the sunlight is blocked, partially, or totally, so they are not able to function.
Because they are not able to function, the pillar corals are dying out, thus living space for other organisms to take their niche in the ecosystem.
The main reason FOR exploiting a tropical rainforest would be the products we get out of it -> pretty orchids for our gardens, the products of plants that can be used as food or medice (1/4 of all medicine comes from the rainforests), the exotic animals, the timber than ccan be used for building, etc.
Answer:
This is very positive mean.
It doesn't sound important
