Final answer:
Aerobic animals living in anoxic sediments typically extract oxygen from other sources present in those sediments, such as bound oxygen in nitrates or sulfates.
Step-by-step explanation:
Aerobic animals living in anoxic sediments have developed unique adaptations to survive in environments that lack free oxygen. The most accurate statement that describes how aerobic animals live in anoxic sediments is c) They extract oxygen from other sources present in sediments. These animals may utilize oxygen that is bound in molecules such as nitrates or sulfates, or they might rely on symbiotic relationships with bacteria that can perform anaerobic respiration to provide them with energy. However, some aerobic animals are also capable of temporarily switching to anaerobic metabolic pathways, although this is less efficient and cannot be sustained for long periods. They do not necessarily undergo hibernation or enter a dormant state, as this would imply an absence of metabolic activity, which is not generally the case.