Final answer:
Animals are considered in research because they can experience pain and suffering. Researchers must minimize any pain or distress experienced by animals in their experiments, following ethical guidelines.
Step-by-step explanation:
Animals are considered because they can experience pain and suffering. In animal research, researchers must design their experiments to minimize any pain or distress experienced by the animals. Animal research is held to a high ethical standard, requiring approval and regular inspections to ensure humane treatment.