Final answer:
Consumers - Giraffes, whales, and birds.
Giraffes, whales, and birds are all consumers; giraffes are herbivores, some whales can be herbivores or carnivores, and birds may be herbivores, carnivores, or omnivores, depending on the species.
Step-by-step explanation:
Giraffes, whales, and birds are all examples of consumers in the ecological context.
These organisms cannot produce their own food through processes like photosynthesis, and instead, they obtain their energy by consuming other organisms.
Within the category of consumers, we see different types, such as herbivores, carnivores, and omnivores. Giraffes are herbivores as they feed on producers like plants (leaves from tall trees, for example).
Whales vary in their diets, some species are filter feeders consuming plankton (thus being considered herbivores), while others are carnivores that feed on fish or even marine mammals.
Birds display a wide range of dietary habits; some are herbivores, others are carnivores preying on insects, fish or rodents, and many are omnivores consuming both plant and animal matter.