Final answer:
Conditions that shift the oxygen-hemoglobin dissociation curve to the left are called factors that increase the affinity of hemoglobin for oxygen.
Step-by-step explanation:
The conditions that shift the oxygen-hemoglobin dissociation curve to the left are called factors that increase the affinity of hemoglobin for oxygen. These factors include a decrease in temperature, a decrease in carbon dioxide levels, and an increase in pH. For example, in the lungs, where oxygen levels are high and carbon dioxide levels are low, the affinity of hemoglobin for oxygen is increased, resulting in more oxygen binding to hemoglobin.