Concept:
Environmental ethics studies the moral relationship between human beings and the natural world.
Different views give moral importance to different parts of nature.
Step 1: Understand Anthropocentrism.
Anthropocentrism gives central importance to human beings.
According to this view, nature is valuable mainly because it serves human interests.
So, option (D) is not correct.
Step 2: Understand Zoo-centrism.
Zoo-centrism gives importance mainly to animals.
But the question mentions all organic life, not only animals.
So, option (A) is not correct.
Step 3: Understand Eco-centrism.
Eco-centrism gives importance to the whole ecosystem.
It includes living and non-living components of nature.
But the question specifically says organic life.
So, option (B) is broader than the required answer.
Step 4: Understand Bio-centrism.
Bio-centrism gives moral importance to all living beings.
Here:
\[
\text{Bio} = \text{life}
\]
Thus, all organic life should be given importance is the idea of bio-centrism.
Hence:
\[
\boxed{\text{Bio-centrism}}
\]