What level comes before "all animal species",in terms of the levels of ethical concern? 

A)  all species on Earth 
B)  all ecosystems 
C)  all people 
D)  all individuals of an animal species

All Ecosystems

The entirety of ecosystems, encompassing diverse environments from tropical forests to desert habitats, each with their unique interactions among living organisms and their surroundings.

Ethical Concern

A situation that requires individuals or organizations to choose between actions that must be evaluated as right or wrong, often involving a moral dilemma.

Animal Species

Distinct groups of animals that share common characteristics and can interbreed to produce fertile offspring, each adapted to specific environments and ways of life.