Humans possess far greater power than other animals. A fair relationship must therefore address how that power is used, whose interests count and whether avoidable suffering is accepted for minor human benefits.
Wild animals are used in performances, tourism, photography, hunting, racing and public spectacle. The ethical question is whether amusement and excitement are sufficient reasons to disturb or control their lives.
Zoos commonly describe themselves as centres for conservation, education and research. Their ethical status depends upon actual welfare, conservation outcomes, breeding decisions and whether captivity benefits the animals involved.
Animal use is often defended through tradition, identity and heritage. Traditions can strengthen communities, but they must still be evaluated according to the suffering they cause and the alternatives available.
Hunting has provided food and materials throughout human history. Where people have reliable access to other food, the ethical case depends less upon survival and more upon suffering, ecological impact, motive and available alternatives.
Debates about animals often divide between welfare, which considers interests, and rights, which places limits upon how individuals may be used. The two approaches overlap but are not identical.
The term humane slaughter suggests that animals can be killed with minimal fear and pain. Improved handling and effective stunning can reduce suffering, but the ethical question also concerns whether ending an animal's life is justified.
Humans use animals for food, clothing, entertainment, research and convenience. The ethical question is whether avoiding expense, effort or habit change can justify pain, fear, confinement and death imposed upon sentient beings.
Conservation often prioritises populations and species, while animal ethics focuses on individual experience. Conflict arises when protecting biodiversity requires harm to animals who are themselves capable of suffering.
Wildlife management may protect habitats, reduce conflict or prevent suffering. It becomes destructive when killing and removal replace clear objectives, reliable evidence and serious efforts to address human causes.
Conservation aims to protect species, habitats and ecological processes. Yet some conservation actions capture, confine, relocate, poison or kill individual animals. A good objective does not make every method harmless or justified.
If a being can suffer, then what happens to that being matters. This does not solve every moral question, but it gives suffering serious ethical weight.