Final answer:
Singer's argument in 'All Animals are Equal' suggests speciesism that aligns conceptually with Systematic, Individual, and Institutional categories, where the interests of animals are systematically, individually, and institutionally undervalued or discriminated against compared to human interests.
Step-by-step explanation:
In Peter Singer's essay All Animals are Equal, he discusses three forms of speciesism which are not explicitly listed as options in the question. However, drawing from Singer's arguments, the broader categories of speciesism he criticizes could conceptually align with Systematic, Individual, and Institutional speciesism.
Systematic speciesism refers to the system-wide discrimination against or disregard for animals' interests purely based on their species. Individual speciesism can be behaviors or attitudes from individuals that prioritize human interests over those of animals without justification. Institutional speciesism involves the embedding of discriminatory practices against animals within organizations or societal structures.
It is important to understand that while these categories can help to describe forms of speciesism, Singer's argument is primarily focused on the ethical consideration of animals and the need to extend principles of equality to them.